python 数字转字符保留几位小数 by gisoracle

#数字转字符保留几位小数 by gisoracle
def floattostr(num,xsnum):
if xsnum==0:
return str(int(num))
nd=round(num,xsnum)
nstr=str(nd)
idx=nstr.index('.')
print idx
p=len(nstr)-idx-1
print p
n=xsnum-p
print n
s=""
for i in range(n):
s=s+"" return nstr+s