python基础-2 编码转换 pycharm 配置 运算符 基本数据类型int str list tupple dict for循环 enumerate序列方法 range和xrange

class str(object):
"""
str(object='') -> str
str(bytes_or_buffer[, encoding[, errors]]) -> str Create a new string object from the given object. If encoding or
errors is specified, then the object must expose a data buffer
that will be decoded using the given encoding and error handler.
Otherwise, returns the result of object.__str__() (if defined)
or repr(object).
encoding defaults to sys.getdefaultencoding().
errors defaults to 'strict'.
"""
def capitalize(self): # real signature unknown; restored from __doc__
""" #将 字符串首字母 小写改大写
S.capitalize() -> str Return a capitalized version of S, i.e. make the first character
have upper case and the rest lower case. """
return "" def casefold(self): # real signature unknown; restored from __doc__
"""
S.casefold() -> str Return a version of S suitable for caseless comparisons.
"""
return "" def center(self, width, fillchar=None): # real signature unknown; restored from __doc__
""" 可以为字符串 填充自定字符 长度=字符+指定字符
S.center(width[, fillchar]) -> str Return S centered in a string of length width. Padding is
done using the specified fill character (default is a space)
"""
return "" def count(self, sub, start=None, end=None): # real signature unknown; restored from __doc__
""" 下面是详细参数：
子串：是要搜索的子串。 开始：从该指数开始搜索。第一个字符从索引0开始。通过默认搜索引擎从索引0开始。 结束：搜索从该指数结束。第一个字符从索引0开始。默认情况下，搜索结束，在最后一个索引。 S.count(sub[, start[, end]]) -> int Return the number of non-overlapping occurrences of substring sub in
string S[start:end]. Optional arguments start and end are
interpreted as in slice notation.
"""
return 0 def encode(self, encoding='utf-8', errors='strict'): # real signature unknown; restored from __doc__
""" 编码 上面有介绍
S.encode(encoding='utf-8', errors='strict') -> bytes Encode S using the codec registered for encoding. Default encoding
is 'utf-8'. errors may be given to set a different error
handling scheme. Default is 'strict' meaning that encoding errors raise
a UnicodeEncodeError. Other possible values are 'ignore', 'replace' and
'xmlcharrefreplace' as well as any other name registered with
codecs.register_error that can handle UnicodeEncodeErrors.
"""
return b"" def endswith(self, suffix, start=None, end=None): # real signature unknown; restored from __doc__
""" 以 某个字符结束
suffix -- 该参数可以是一个字符串或者是一个元素。 start -- 字符串中的开始位置。 end -- 字符中结束位置。 返回值 如果字符串含有指定的后缀返回True，否则返回False。 S.endswith(suffix[, start[, end]]) -> bool Return True if S ends with the specified suffix, False otherwise.
With optional start, test S beginning at that position.
With optional end, stop comparing S at that position.
suffix can also be a tuple of strings to try.
"""
return False def expandtabs(self, tabsize=8): # real signature unknown; restored from __doc__
""" 把tab转换成空格
S.expandtabs(tabsize=8) -> str Return a copy of S where all tab characters are expanded using spaces.
If tabsize is not given, a tab size of 8 characters is assumed.
"""
return "" def find(self, sub, start=None, end=None): # real signature unknown; restored from __doc__
"""
find(str, pos_start, pos_end) 解释： str:被查找“字串” pos_start:查找的首字母位置（从0开始计数。默认：0） pos_end: 查找的末尾位置（默认-1） 返回值：如果查到：返回查找的第一个出现的位置。否则，返回-1。 S.find(sub[, start[, end]]) -> int Return the lowest index in S where substring sub is found,
such that sub is contained within S[start:end]. Optional
arguments start and end are interpreted as in slice notation. Return -1 on failure.
"""
return 0 def format(*args, **kwargs): # known special case of str.format
""" 占位符 类似变量引用
s = "print hell {0} ,age {1}"
print(s.format('alex',19)) S.format(*args, **kwargs) -> str Return a formatted version of S, using substitutions from args and kwargs.
The substitutions are identified by braces ('{' and '}').
"""
pass def format_map(self, mapping): # real signature unknown; restored from __doc__
"""字符串格式化，动态参数，将函数式编程时细说
S.format_map(mapping) -> str Return a formatted version of S, using substitutions from mapping.
The substitutions are identified by braces ('{' and '}').
"""
return "" def index(self, sub, start=None, end=None): # real signature unknown; restored from __doc__
""" #跟find类似但是 没有找到的话会报错。 而find是返回-1
S.index(sub[, start[, end]]) -> int Like S.find() but raise ValueError when the substring is not found.
"""
return 0 def isalnum(self): # real signature unknown; restored from __doc__
""" #判断是否是数字和字母
S.isalnum() -> bool Return True if all characters in S are alphanumeric
and there is at least one character in S, False otherwise.
"""
return False def isalpha(self): # real signature unknown; restored from __doc__
"""是否是字母
S.isalpha() -> bool Return True if all characters in S are alphabetic
and there is at least one character in S, False otherwise.
"""
return False def isdecimal(self): # real signature unknown; restored from __doc__
"""
S.isdecimal() -> bool Return True if there are only decimal characters in S,
False otherwise.
"""
return False def isdigit(self): # real signature unknown; restored from __doc__
""" 是否是数字
S.isdigit() -> bool Return True if all characters in S are digits
and there is at least one character in S, False otherwise.
"""
return False def isidentifier(self): # real signature unknown; restored from __doc__
"""
S.isidentifier() -> bool Return True if S is a valid identifier according
to the language definition. Use keyword.iskeyword() to test for reserved identifiers
such as "def" and "class".
"""
return False def islower(self): # real signature unknown; restored from __doc__
"""是否小写字母
S.islower() -> bool Return True if all cased characters in S are lowercase and there is
at least one cased character in S, False otherwise.
"""
return False def isnumeric(self): # real signature unknown; restored from __doc__
"""
S.isnumeric() -> bool Return True if there are only numeric characters in S,
False otherwise.
"""
return False def isprintable(self): # real signature unknown; restored from __doc__
"""
S.isprintable() -> bool Return True if all characters in S are considered
printable in repr() or S is empty, False otherwise.
"""
return False def isspace(self): # real signature unknown; restored from __doc__
"""是否是空格
S.isspace() -> bool Return True if all characters in S are whitespace
and there is at least one character in S, False otherwise.
"""
return False def istitle(self): # real signature unknown; restored from __doc__
""" 是否是标题 字符串开头是大写 后面是小写
S.istitle() -> bool Return True if S is a titlecased string and there is at least one
character in S, i.e. upper- and titlecase characters may only
follow uncased characters and lowercase characters only cased ones.
Return False otherwise.
"""
return False def isupper(self): # real signature unknown; restored from __doc__
""" 是否是大写
S.isupper() -> bool Return True if all cased characters in S are uppercase and there is
at least one cased character in S, False otherwise.
"""
return False def join(self, iterable): # real signature unknown; restored from __doc__
""" 拼接 后面有例子 S.join(iterable) -> str Return a string which is the concatenation of the strings in the
iterable. The separator between elements is S.
"""
return "" def ljust(self, width, fillchar=None): # real signature unknown; restored from __doc__
""" 内容左对齐，右侧填充"""
"""
ljust()方法语法： str.ljust(width[, fillchar]) 参数 width -- 指定字符串长度。 fillchar -- 填充字符，默认为空格。 返回值 返回一个原字符串左对齐,并使用空格填充至指定长度的新字符串。如果指定的长度小于原字符串的长度则返回原字符串。 S.ljust(width[, fillchar]) -> str
Return S left-justified in a Unicode string of length width.Padding is done using the specified fill character (default is a space).
"""
return "" def lower(self): # real signature unknown; restored from __doc__
""" 转换为小写
S.lower() -> str
Return a copy of the string S converted to lowercase.
"""
return "" def lstrip(self, chars=None): # real signature unknown; restored from __doc__
""" 去除左侧开头空白
S.lstrip([chars]) -> str
Return a copy of the string S with leading whitespace removed. If chars is given and not None, remove characters in chars instead.
"""
return "" def maketrans(self, *args, **kwargs): # real signature unknown
""" Return a translation table usable for str.translate(). If there is only one argument, it must be a dictionary mapping Unicode ordinals (integers) or characters to Unicode ordinals, strings or None. Character keys will be then converted to ordinals. If there are two arguments, they must be strings of equal length, and in the resulting dictionary, each character in x will be mapped to the character at the same position in y. If there is a third argument, it must be a string, whose characters will be mapped to None in the result.
"""
pass def partition(self, sep): # real signature unknown; restored from __doc__
""" 以指定 字符 开始分割 指定的字符也显示
S.partition(sep) -> (head, sep, tail) Search for the separator sep in S, and return the part before it, the separator itself, and the part after it. If the separator is not found, return S and two empty strings.
"""
pass
def replace(self, old, new, count=None): # real signature unknown; restored from __doc__
""" 替换
old -- 将被替换的子字符串。 new -- 新字符串，用于替换old子字符串。 max -- 可选字符串, 替换不超过 max 次 返回值 返回字符串中的 old（旧字符串） 替换成 new(新字符串)后生成的新字符串，如果指定第三个参数max，则替换不超过 max 次。 S.replace(old, new[, count]) -> str Return a copy of S with all occurrences of substring
old replaced by new. If the optional argument count is
given, only the first count occurrences are replaced.
"""
return "" def rfind(self, sub, start=None, end=None): # real signature unknown; restored from __doc__
""" 从右开始查找
S.rfind(sub[, start[, end]]) -> int Return the highest index in S where substring sub is found,
such that sub is contained within S[start:end]. Optional
arguments start and end are interpreted as in slice notation. Return -1 on failure.
"""
return 0 def rindex(self, sub, start=None, end=None): # real signature unknown; restored from __doc__
""" 顾名思义从右侧匹配
S.rindex(sub[, start[, end]]) -> int Like S.rfind() but raise ValueError when the substring is not found.
"""
return 0 def rjust(self, width, fillchar=None): # real signature unknown; restored from __doc__
""" 从右侧 填充
S.rjust(width[, fillchar]) -> str Return S right-justified in a string of length width. Padding is
done using the specified fill character (default is a space).
"""
return "" def rpartition(self, sep): # real signature unknown; restored from __doc__
""" 从右侧开始找到 分割 分割字符也显示
S.rpartition(sep) -> (head, sep, tail) Search for the separator sep in S, starting at the end of S, and return
the part before it, the separator itself, and the part after it. If the
separator is not found, return two empty strings and S.
"""
pass def rsplit(self, sep=None, maxsplit=-1): # real signature unknown; restored from __doc__
""" 从右侧开始分割 sep是指定几个
S.rsplit(sep=None, maxsplit=-1) -> list of strings Return a list of the words in S, using sep as the
delimiter string, starting at the end of the string and
working to the front. If maxsplit is given, at most maxsplit
splits are done. If sep is not specified, any whitespace string
is a separator.
"""
return [] def rstrip(self, chars=None): # real signature unknown; restored from __doc__
""" 从右侧 去除结尾的空格
S.rstrip([chars]) -> str Return a copy of the string S with trailing whitespace removed.
If chars is given and not None, remove characters in chars instead.
"""
return "" def split(self, sep=None, maxsplit=-1): # real signature unknown; restored from __doc__
""" 分割 sep是几个算分割符
S.split(sep=None, maxsplit=-1) -> list of strings Return a list of the words in S, using sep as the
delimiter string. If maxsplit is given, at most maxsplit
splits are done. If sep is not specified or is None, any
whitespace string is a separator and empty strings are
removed from the result.
"""
return [] def splitlines(self, keepends=None): # real signature unknown; restored from __doc__
"""
S.splitlines([keepends]) -> list of strings Return a list of the lines in S, breaking at line boundaries.
Line breaks are not included in the resulting list unless keepends
is given and true.
"""
return [] def startswith(self, prefix, start=None, end=None): # real signature unknown; restored from __doc__
""" 指定以什么开始
S.startswith(prefix[, start[, end]]) -> bool Return True if S starts with the specified prefix, False otherwise.
With optional start, test S beginning at that position.
With optional end, stop comparing S at that position.
prefix can also be a tuple of strings to try.
"""
return False def strip(self, chars=None): # real signature unknown; restored from __doc__
""" 去除两端空格
S.strip([chars]) -> str Return a copy of the string S with leading and trailing
whitespace removed.
If chars is given and not None, remove characters in chars instead.
"""
return "" def swapcase(self): # real signature unknown; restored from __doc__
""" 大写转小写小写转大写
S.swapcase() -> str Return a copy of S with uppercase characters converted to lowercase
and vice versa.
"""
return "" def title(self): # real signature unknown; restored from __doc__
"""
S.title() -> str Return a titlecased version of S, i.e. words start with title case
characters, all remaining cased characters have lower case.
"""
return "" def translate(self, table): # real signature unknown; restored from __doc__
""" 转换，需要先做一个对应表，最后一个表示删除字符集合
intab = "aeiou"
outtab = "12345"
trantab = maketrans(intab, outtab)
str = "this is string example....wow!!!"print str.translate(trantab, 'xm') S.translate(table) -> str Return a copy of the string S in which each character has been mapped
through the given translation table. The table must implement
lookup/indexing via __getitem__, for instance a dictionary or list,
mapping Unicode ordinals to Unicode ordinals, strings, or None. If
this operation raises LookupError, the character is left untouched.
Characters mapped to None are deleted.
"""
return "" def upper(self): # real signature unknown; restored from __doc__
""" 大写显示
S.upper() -> str Return a copy of S converted to uppercase.
"""
return "" def zfill(self, width): # real signature unknown; restored from __doc__
""" 方法返回指定长度的字符串，原字符串右对齐，前面填充0。
S.zfill(width) -> str Pad a numeric string S with zeros on the left, to fill a field
of the specified width. The string S is never truncated.
"""
return "" def __add__(self, *args, **kwargs): # real signature unknown
""" Return self+value. """
pass def __contains__(self, *args, **kwargs): # real signature unknown
""" Return key in self. """
pass def __eq__(self, *args, **kwargs): # real signature unknown
""" Return self==value. """
pass def __format__(self, format_spec): # real signature unknown; restored from __doc__
"""
S.__format__(format_spec) -> str Return a formatted version of S as described by format_spec.
"""
return "" def __getattribute__(self, *args, **kwargs): # real signature unknown
""" Return getattr(self, name). """
pass def __getitem__(self, *args, **kwargs): # real signature unknown
""" Return self[key]. """
pass def __getnewargs__(self, *args, **kwargs): # real signature unknown
pass def __ge__(self, *args, **kwargs): # real signature unknown
""" Return self>=value. """
pass def __gt__(self, *args, **kwargs): # real signature unknown
""" Return self>value. """
pass def __hash__(self, *args, **kwargs): # real signature unknown
""" Return hash(self). """
pass def __init__(self, value='', encoding=None, errors='strict'): # known special case of str.__init__
"""
str(object='') -> str
str(bytes_or_buffer[, encoding[, errors]]) -> str Create a new string object from the given object. If encoding or
errors is specified, then the object must expose a data buffer
that will be decoded using the given encoding and error handler.
Otherwise, returns the result of object.__str__() (if defined)
or repr(object).
encoding defaults to sys.getdefaultencoding().
errors defaults to 'strict'.
# (copied from class doc)
"""
pass def __iter__(self, *args, **kwargs): # real signature unknown
""" Implement iter(self). """
pass def __len__(self, *args, **kwargs): # real signature unknown
""" Return len(self). """
pass def __le__(self, *args, **kwargs): # real signature unknown
""" Return self<=value. """
pass def __lt__(self, *args, **kwargs): # real signature unknown
""" Return self<value. """
pass def __mod__(self, *args, **kwargs): # real signature unknown
""" Return self%value. """
pass def __mul__(self, *args, **kwargs): # real signature unknown
""" Return self*value.n """
pass @staticmethod # known case of __new__
def __new__(*args, **kwargs): # real signature unknown
""" Create and return a new object. See help(type) for accurate signature. """
pass def __ne__(self, *args, **kwargs): # real signature unknown
""" Return self!=value. """
pass def __repr__(self, *args, **kwargs): # real signature unknown
""" Return repr(self). """
pass def __rmod__(self, *args, **kwargs): # real signature unknown
""" Return value%self. """
pass def __rmul__(self, *args, **kwargs): # real signature unknown
""" Return self*value. """
pass def __sizeof__(self): # real signature unknown; restored from __doc__
""" S.__sizeof__() -> size of S in memory, in bytes """
pass def __str__(self, *args, **kwargs): # real signature unknown
""" Return str(self). """
pass

class list(object):
"""
list() -> new empty list
list(iterable) -> new list initialized from iterable's items
"""
def append(self, p_object): # real signature unknown; restored from __doc__
""" 添加 元素
L.append(object) -> None -- append object to end """
pass def clear(self): # real signature unknown; restored from __doc__
""" 清空元素
L.clear() -> None -- remove all items from L """
pass def copy(self): # real signature unknown; restored from __doc__
""" 浅copy L.copy() -> list -- a shallow copy of L """
return [] def count(self, value): # real signature unknown; restored from __doc__
""" 匹配 value的个数 L.count(value) -> integer -- return number of occurrences of value """
return 0 def extend(self, iterable): # real signature unknown; restored from __doc__
""" 拼接两个列表 L.extend(iterable) -> None -- extend list by appending elements from the iterable """
pass def index(self, value, start=None, stop=None): # real signature unknown; restored from __doc__
""" 返回 某个value 的索引
L.index(value, [start, [stop]]) -> integer -- return first index of value.
Raises ValueError if the value is not present.
"""
return 0 def insert(self, index, p_object): # real signature unknown; restored from __doc__
""" 指定索引位置处添加元素 L.insert(index, object) -- insert object before index """
pass def pop(self, index=None): # real signature unknown; restored from __doc__
""" 删除结尾的元素
L.pop([index]) -> item -- remove and return item at index (default last).
Raises IndexError if list is empty or index is out of range.
"""
pass def remove(self, value): # real signature unknown; restored from __doc__
""" 移除 从左测匹配的第一个元素
L.remove(value) -> None -- remove first occurrence of value.
Raises ValueError if the value is not present.
"""
pass def reverse(self): # real signature unknown; restored from __doc__
""" 反转列表 L.reverse() -- reverse *IN PLACE* """
pass def sort(self, key=None, reverse=False): # real signature unknown; restored from __doc__
""" 排序 但是int str不行 L.sort(key=None, reverse=False) -> None -- stable sort *IN PLACE* """
pass def __add__(self, *args, **kwargs): # real signature unknown
""" Return self+value. """
pass def __contains__(self, *args, **kwargs): # real signature unknown
""" Return key in self. """
pass def __delitem__(self, *args, **kwargs): # real signature unknown
""" Delete self[key]. """
pass def __eq__(self, *args, **kwargs): # real signature unknown
""" Return self==value. """
pass def __getattribute__(self, *args, **kwargs): # real signature unknown
""" Return getattr(self, name). """
pass def __getitem__(self, y): # real signature unknown; restored from __doc__
""" x.__getitem__(y) <==> x[y] """
pass def __ge__(self, *args, **kwargs): # real signature unknown
""" Return self>=value. """
pass def __gt__(self, *args, **kwargs): # real signature unknown
""" Return self>value. """
pass def __iadd__(self, *args, **kwargs): # real signature unknown
""" Implement self+=value. """
pass def __imul__(self, *args, **kwargs): # real signature unknown
""" Implement self*=value. """
pass def __init__(self, seq=()): # known special case of list.__init__
"""
list() -> new empty list
list(iterable) -> new list initialized from iterable's items
# (copied from class doc)
"""
pass def __iter__(self, *args, **kwargs): # real signature unknown
""" Implement iter(self). """
pass def __len__(self, *args, **kwargs): # real signature unknown
""" Return len(self). """
pass def __le__(self, *args, **kwargs): # real signature unknown
""" Return self<=value. """
pass def __lt__(self, *args, **kwargs): # real signature unknown
""" Return self<value. """
pass def __mul__(self, *args, **kwargs): # real signature unknown
""" Return self*value.n """
pass @staticmethod # known case of __new__
def __new__(*args, **kwargs): # real signature unknown
""" Create and return a new object. See help(type) for accurate signature. """
pass def __ne__(self, *args, **kwargs): # real signature unknown
""" Return self!=value. """
pass def __repr__(self, *args, **kwargs): # real signature unknown
""" Return repr(self). """
pass def __reversed__(self): # real signature unknown; restored from __doc__
""" L.__reversed__() -- return a reverse iterator over the list """
pass def __rmul__(self, *args, **kwargs): # real signature unknown
""" Return self*value. """
pass def __setitem__(self, *args, **kwargs): # real signature unknown
""" Set self[key] to value. """
pass def __sizeof__(self): # real signature unknown; restored from __doc__
""" L.__sizeof__() -- size of L in memory, in bytes """
pass __hash__ = None

######列表########## #!/usr/bin/env python
# _*_ coding:utf-8 _*_ lis=[1,2,3,'alex']
cc=[5,5]
print(lis.count("alex"))
lis.extend(cc)
print(lis) name_list = ["eirc", "alex", 'tony']
"""
# 索引
print(name_list[0])
# 切片
print(name_list[0:2])
# len
print(name_list[2:len(name_list)])
# for
for i in name_list:
print(i) #join 方法，拼接字符串
li = ["alex","eric"]
name = "li jie"
ss = "_".join(li)
s = "_".join(name)
print(s,ss) """
# 列表内部提供的其他功能
# append后追加
name_list.append('seven')
name_list.append('seven')
name_list.append('seven')
print(name_list)
# 元素出现的次数
print(name_list.count('seven'))
# iterable，可迭代的
temp = [111,22,33,44]
# 扩展，批量添加
name_list.extend(temp)
print(name_list)
# 获取指定元素的索引位置
print(name_list.index('alex'))
# 向指定索引位置插入数据
name_list.insert(1, 'SB')
print(name_list)
# 在原列表中移除掉最后一个元素，并将其赋值给 a1
a1 = name_list.pop()
print(name_list)
print(a1)
# 移除某个元素
name_list.remove('seven')
print(name_list)
# 翻转
name_list.reverse()
print(name_list) #删除指定索引位置
print(name_list)
del name_list[1:3]
print(name_list)

class tuple(object):
"""
tuple() -> empty tuple
tuple(iterable) -> tuple initialized from iterable's items If the argument is a tuple, the return value is the same object.
"""
def count(self, value): # real signature unknown; restored from __doc__
""" 计算 value的个数 T.count(value) -> integer -- return number of occurrences of value """
return 0 def index(self, value, start=None, stop=None): # real signature unknown; restored from __doc__
""" 索引
T.index(value, [start, [stop]]) -> integer -- return first index of value.
Raises ValueError if the value is not present.
"""
return 0 def __add__(self, *args, **kwargs): # real signature unknown
""" Return self+value. """
pass def __contains__(self, *args, **kwargs): # real signature unknown
""" Return key in self. """
pass def __eq__(self, *args, **kwargs): # real signature unknown
""" Return self==value. """
pass def __getattribute__(self, *args, **kwargs): # real signature unknown
""" Return getattr(self, name). """
pass def __getitem__(self, *args, **kwargs): # real signature unknown
""" Return self[key]. """
pass def __getnewargs__(self, *args, **kwargs): # real signature unknown
pass def __ge__(self, *args, **kwargs): # real signature unknown
""" Return self>=value. """
pass def __gt__(self, *args, **kwargs): # real signature unknown
""" Return self>value. """
pass def __hash__(self, *args, **kwargs): # real signature unknown
""" Return hash(self). """
pass def __init__(self, seq=()): # known special case of tuple.__init__
"""
tuple() -> empty tuple
tuple(iterable) -> tuple initialized from iterable's items If the argument is a tuple, the return value is the same object.
# (copied from class doc)
"""
pass def __iter__(self, *args, **kwargs): # real signature unknown
""" Implement iter(self). """
pass def __len__(self, *args, **kwargs): # real signature unknown
""" Return len(self). """
pass def __le__(self, *args, **kwargs): # real signature unknown
""" Return self<=value. """
pass def __lt__(self, *args, **kwargs): # real signature unknown
""" Return self<value. """
pass def __mul__(self, *args, **kwargs): # real signature unknown
""" Return self*value.n """
pass @staticmethod # known case of __new__
def __new__(*args, **kwargs): # real signature unknown
""" Create and return a new object. See help(type) for accurate signature. """
pass def __ne__(self, *args, **kwargs): # real signature unknown
""" Return self!=value. """
pass def __repr__(self, *args, **kwargs): # real signature unknown
""" Return repr(self). """
pass def __rmul__(self, *args, **kwargs): # real signature unknown
""" Return self*value. """
pass

############### 元组 #################
name_tuple = ('alex', 'eric')
# 索引
print(name_tuple[0])
# len
print(name_tuple[len(name_tuple)-1])
# 切片
print(name_tuple[0:1])
# for
for i in name_tuple:
print(i)
# 删除
# del name_tuple[0] 不支持
# count，计算元素出现的个数
print(name_tuple.count('alex'))
# index 获取指定元素的索引位置
print(name_tuple.index('alex'))

user_info={"name":"alex",
"age":18,
"gender":"M",
}

li=["kk","jkjkj","sdfj"]
new_dict=dict(enumerate(li))
print new_dict #{0: 'kk', 1: 'jkjkj', 2: 'sdfj'}

创建操作>>>person = {"name": "alex", 'age': 20}
#或
>>>person = dict(name='seven', age=20)
#或
>>>person = dict({"name": "egon", 'age': 20})
#或
>>> {}.fromkeys([1,2,3,4,5,6,7,8],100)
{1: 100, 2: 100, 3: 100, 4: 100, 5: 100, 6: 100, 7: 100, 8: 100}
增加操作names = {
"alex": [23, "CEO", 66000],
"黑姑娘": [24, "行政", 4000],
}
# 新增k
names["佩奇"] = [26, "讲师", 40000]
names.setdefault("oldboy",[50,"boss",100000]) # D.setdefault(k[,d]) -> D.get(k,d), also set D[k]=d if k not in D
删除操作names.pop("alex") # 删除指定key
names.popitem() # 随便删除1个key
del names["oldboy"] # 删除指定key,同pop方法
names.clear() # 清空dict
修改操作dic['key'] = 'new_value',如果key在字典中存在，'new_value'将会替代原来的value值；
dic.update(dic2) 将字典dic2的键值对添加到字典dic中，如果有重复的key，这更新value值
查操作dic['key'] #返回字典中key对应的值，若key不存在字典中，则报错；
dic.get(key, default = None)#返回字典中key对应的值，若key不存在字典中，则返回default的值（default默认为None）
'key' in dic #若存在则返回True，没有则返回False
dic.keys() 返回一个包含字典所有KEY的列表；
dic.values() 返回一个包含字典所有value的列表；
dic.items() 返回一个包含所有（键，值）元组的列表；
循环1、for k in dic.keys()
2、for k,v in dic.items()
3、for k in dic # 推荐用这种，效率速度最快
info = {
"name":"小猿圈",
"mission": "帮一千万极客高效学编程",
"website": "http://apeland.com"
}
for k in info:
print(k,info[k])
输出
name 小猿圈
mission 帮一千万极客高效学编程
website http://apeland.com
求长度len(dic)

#!/usr/bin/env python
# _*_ coding:utf-8 _*_ dic={1:2,"alex":4,4:9}
print(dic.get("alex"))
print(dic.items())
print(dic.keys())
print(dic.values())
print(dic.pop(2,None))
print(dic.setdefault("name","rain")) ###################### 字典 ###################
# 字典的每一个元素，键值对
user_info = {
0: "alex",
"age": 73,
2: 'M'
}
# 0 “alex"
# 1 73 # 索引
# print(user_info[0])
# print(user_info["age"]) # 循环，默认值输出key
# for i in user_info:
# print(i) # # 获取所有键
# print(user_info.keys())
# # 获取所有值
# print(user_info.values())
# # 获取所有键值对
# print(user_info.items()) # for i in user_info.keys():
# print(i)
#
# for i in user_info.values():
# print(i) # user_info = {
# 0: "alex",
# "age": 73,
# 2: 'M'
# }
# for k,v in user_info.items():
# print(k)
# print(v) # clear，清除所有内容
# user_info.clear()
# print(user_info) # get 根据key获取值，如果key不存在，可以指定一个默认值
# val = user_info.get('age')
# print(val)
# val = user_info.get('age', '123')
# print(val)
# 索引取值时，key不存在，报错
# print(user_info['age'])
# print(user_info['age1111']) # has_key 检查字典中指定key是否存在 3版本python没有了 可以用in 判断
# ret = 'agfffe' in user_info.keys()
# print(ret)
# pop # popitem # update
# print(user_info)
# test = {
# "a1": 123,
# 'a2': 456
# }
# user_info.update(test)
# print(user_info) # 删除指定索引的键值对
test = {
"a1": 123,
'a2': 456
} del test['a1']
print(test)

#!/usr/bin/env python
# -*- coding:utf-8 -*-
#dict字典的特殊方法 user_info={"name":"alex",
"age":18,
"gender":"M"
}
print len(user_info)#长度
#user_info.clear()#清空字典，清楚所有内容
print user_info.get("name")
print user_info.get("name1",123) # """ 根据key获取值，d是默认值 """如果key不存在，返回默认值，不会报错
print user_info["name"] #如果不存在会报错
print user_info.has_key("name") #""" 是否有key """
a=user_info.pop("age")#获取并在字典中移除,可以将key赋值给一个变量
print user_info,a
a=user_info.popitem()#移除key values 赋值给一个元祖中
print user_info, user_info.iteritems()
print user_info
user_info.update({"kkk":"jjk"})#更新
print user_info #@staticmethod,类方法
user_info_new=dict.fromkeys(["k","name"],"alex")
print user_info_new

2版本python 查看字典有没有这个key
>>> contact['']
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
KeyError: ''
>>> contact.has_key('')
False
>>> contact.has_key('')
True
清空字典contact.clear()
>>> contact.clear()

li = [11,22,33]
for k,v in enumerate(li, 1):
print(k,v)

8、练习题

1、元素分类

有如下值集合 [11,22,33,44,55,66,77,88,99,90]，将所有大于 66 的值保存至字典的第一个key中，将小于等于 66 的值保存至第二个key的值中。
即： {'k1': 大于66的所有值, 'k2': 小于66的所有值}