python:create file

 

?

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52

# calculate file size in KB, MB, GB def convert_bytes(size):        """     Convert bytes to KB, or MB or GB     :param size     :return     """     for x in ['bytes', 'KB', 'MB', 'GB', 'TB']:         if size < 1024.0:             return "%3.1f %s" % (size, x)         size /= 1024.0 def get_size(file_size, unit='bytes'):     #file_size = os.path.getsize(file_path)     exponents_map = {'bytes': 0, 'kb': 1, 'mb': 2, 'gb': 3}     if unit not in exponents_map:         raise ValueError("Must select from ['bytes', 'kb', 'mb', 'gb']")     else:         size = file_size / 1024 ** exponents_map[unit]         return str(round(size, 3))+' '+unit   # Press the green button in the gutter to run the script. if __name__ == '__main__':     #print_hi('PyCharm,python language')     #创建目录     #os.mkdir(path)     filename = '1.py'     try:         if not os.path.exists("Common"):             os.mkdir("Common")         else:             if os.path.exists("Common/"+filename):                 print(filename)                 with io.open("Common/" + filename, 'r', encoding='utf8') as f:                     text = f.read()                     print(text)             else:                 os.chdir("Common/")                 with io.open(filename, 'w', encoding='utf8') as f:                     f.write('#涂聚文\nimport io \n import sys \nimport os \n size=10')                 with io.open("Common/" + filename, 'r', encoding='utf8') as f:                     text = f.read()                     print(text)     except FileNotFoundError:         print('文件不存在')     except PermissionError:         print('权限错误')     if os.path.exists("Common/"+filename):         size = os.path.getsize("Common/" +filename)         creation_time = os.path.getctime("Common/" +filename)         extension = os.path.splitext("Common/" +filename)[1]         t = time.localtime(creation_time)         print(f"{get_size(size,'bytes')},{time.strftime('%Y-%m-%d %H:%M:%S', t)},{extension}")

　　

?

1 2 3 4 5 6 7 8 9 10 11 12 13

#同时迭代多个序列 du=[1,3,8,8] ku=[4,9,12,38] ju=[8,9,10,18] for x,y in zip(du,ku):     print(x,y)   for x,y,z in zip(du,ku,ju):     print(x,y,z)   # 以索引--值的形式迭代序列 for idx,val in enumerate(du):     print(idx,val)