1.遍歷一個(gè)文件夾

            
              apks = 'C:\\xxx'
filenames = os.listdir(apks)
for filename in filesnames:               #此處遍歷出來(lái)的非完整路徑，只是文件名字
    do_something(apks+"\\"+filename)      #絕對(duì)路徑需要拼接處理
            
          

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2.判斷一個(gè)文件或文件夾是否存在

            
              import os
os.path.exists(test_file.txt)
            
          

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3.string轉(zhuǎn)dict,dict轉(zhuǎn)string

            
              #string轉(zhuǎn)dict，使用eval函數(shù)
test_str = '{"a":3,"b":4}'
test_dict = eval(test_str)


#dict轉(zhuǎn)string,使用str函數(shù)
test_dict = {"a":3,"b":4}
test_str = str(test_dict)
            
          

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4.遍歷一個(gè)dict

            
              for key,value in dict.items():
    do_something(key,value)
            
          

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5.讀寫文件

            
              #寫文件
with open("test.txt", 'w') as file_object:            
    file_object.write("hello world!")


#讀文件
with open("test.txt",'r") as file_object:
    test_string = file_object.read()
            
          

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