请问如何用python让3个for循环按照以下方式运行？ python 中怎么运行for循环
python\u4e09\u4e2afor\u5faa\u73af\u600e\u4e48\u4f7f\u7528\u4e00\u822c\u6765\u8bf4\uff0cfor \u5faa\u73af\u662f\u5229\u7528\u7684\u904d\u5386\u6765\u5b9e\u73b0\u7684
\u57fa\u7840\u8bed\u6cd5\u662f
for i in sequence:
statements(s)
\u53e6\u5916\u4e00\u79cd\u6267\u884c\u5faa\u73af\u7684\u904d\u5386\u65b9\u5f0f\u662f\u901a\u8fc7\u7d22\u5f15
\u4f8b\u5982\uff1a
fruits = ['banana', 'apple', 'mango']
for index in range(len(fruits)):
print '\u5f53\u524d\u6c34\u679c :', fruits[index]
\u7b2c\u4e09\u79cd\u65b9\u5f0f\u5c31\u662f\u53ef\u4ee5\u548celse\u8fde\u7528\uff0cfor \u2026 else \u8868\u793a\u8fd9\u6837\u7684\u610f\u601d\uff0cfor \u4e2d\u7684\u8bed\u53e5\u548c\u666e\u901a\u7684\u6ca1\u6709\u533a\u522b\uff0celse \u4e2d\u7684\u8bed\u53e5\u4f1a\u5728\u5faa\u73af\u6b63\u5e38\u6267\u884c\u5b8c\uff08\u5373 for \u4e0d\u662f\u901a\u8fc7 break \u8df3\u51fa\u800c\u4e2d\u65ad\u7684\uff09\u7684\u60c5\u51b5\u4e0b\u6267\u884c
\u4f8b\u5982\uff1a
for num in range(10,20): # \u8fed\u4ee3 10 \u5230 20 \u4e4b\u95f4\u7684\u6570\u5b57
for i in range(2,num): # \u6839\u636e\u56e0\u5b50\u8fed\u4ee3
if num%i == 0: # \u786e\u5b9a\u7b2c\u4e00\u4e2a\u56e0\u5b50
j=num/i # \u8ba1\u7b97\u7b2c\u4e8c\u4e2a\u56e0\u5b50
print '%d \u7b49\u4e8e %d * %d' % (num,i,j)
break # \u8df3\u51fa\u5f53\u524d\u5faa\u73af
else: # \u5faa\u73af\u7684 else \u90e8\u5206
print num, '\u662f\u4e00\u4e2a\u8d28\u6570'
python\u7528for\u5faa\u73af\u904d\u5386\u6587\u4ef6\u64cd\u4f5c\uff0c\u4ee3\u7801\u5982\u4e0b\uff1a #!\urs\bin\env python#encoding:utf-8 #\u8bbe\u7f6e\u7f16\u7801\u65b9\u5f0f import osimport reclass loop_file: def __init__(self, root_dir, short_exclude=[], long_exclude=[], file_extend=[]): self.root_dir = root...
用生成器
# 迭代目录下每一个文件
def iter_dir(path):
....for file in os.listdir(path):
........yield ...
# 迭代excel中工作表？行？
def iter_excel(file):
....with xlrd.open_workbook(file) as wb:
........for ....
............yield ...
#同时迭代两个目录中的文件与Excel中某对象
def myiter(path1,path2,excelfile):
....iter1,iter2,iter3=iter_dir(path1),iter_dir(path2),iter_excel(excelfile)
....while True:
........item = [next(iter1),next(iter2),next(iter3)]
........if item[0] and item[1] and item[2]:
............yield item
........else:
............raise StopIteration
#然后就可以用myiter去做循环了：
for file1,file2,xls in myiter('d:/source','d:/dest','d:/aa.xls'):
....想做了点什么就去做吧
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绛旓細Python缂栫▼涓敤for()寰幆鍒涘缓澶氫釜鏂囦欢锛屼唬鐮佸涓嬶細coding=utf-8'''Created on 2015-07-05'''import osimport timedef nsfile(s): '''The number of new expected documents''' #鍒ゆ柇鏂囦欢澶规槸鍚﹀瓨鍦紝濡傛灉涓嶅瓨鍦ㄥ垯鍒涘缓 b = os.path.exists("E:\\testFile\\") if b: print "File...
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