read(size),每次读取size个字节的内容,适合于未知文件大小的读取; readline( ),每次读取一行内容; readlines( ),一次性读取所有内容,并按行返回list,适用于配置文件的读取。 file-like Object:像open()函数返回的这种有个read()方法的对象,在Python中统称为file-like Object。除了file外,还可以是内存的字节流,网...
# Maximum number of file downloading retries. MAX_TIMES_RETRY_DOWNLOAD = 3 MAX_TIMES_RETRY = 5 DELAY_INTERVAL = 10 # Define the file length. FELMNAMME_127 = 127 FELMNAMME_64 = 64 FELMNAMME_4 = 4 FELMNAMME_5 = 5 # Mode for activating the device deployment file EFFECTIVE_MODE_REBOOT...
importpandasaspdimportsys# 读取CSV文件data=pd.read_csv('data.csv')# 计算内存大小size=data.memory_usage(deep=True).sum()# 计算文件大小file_size=sys.getsizeof(data)# 输出结果print(f"The size of the data is{size}bytes")print(f"The size of the file is{file_size}bytes") 1. 2. 3. ...
926L # size of somefile.txt input: os.stat ("temp"), posix.stat_result(st_mode=33188, st_ino=279987L, st_dev=2049L, st_nlink=1, st_uid=1000, st_gid=1000, st_size=1316889L, st_atime=1340701004, st_mtime=1340701837, st_ctime=1340701837) >>> sinfo = os.stat("temp") >>> ...
'__sizeof__', '__str__', '__subclasshook__', '_formatter_field_name_split', '_formatter_parser', 'capitalize', 'center', 'count', 'decode', 'encode', 'endswith', 'expandtabs', 'find', 'format', 'index', 'isalnum', 'isalpha', 'isdigit', 'islower', 'isspace', 'istitle'...
type_of_banana = example_dict['banana'] •检查键是否存在:使用关键字in判断键是否存在于字典中。 if 'orange' in example_dict: print("Orange is in the dictionary!") 除此之外,Python还提供了许多高级操作,如dict.setdefault(),dict.update(),dict.pop(),dict.get()等,使得字典成为解决实际问题时不...
importosdefget_folder_size(folder):total_size=0forpath,dirs,filesinos.walk(folder):forfileinfiles:file_path=os.path.join(path,file)total_size+=os.path.getsize(file_path)returntotal_size folder_size=get_folder_size('/path/to/folder')print(f"The size of the folder is{folder_size}bytes....
str1 = "The first letter of '{word}' is '{word[0]}'.".format(word="hello") print(str1) 执行以上代码,输出结果为: The first letter of 'hello' is 'h'. (7)数字的处理 ① 保留小数位数 str1 = "π is {:.2f}.".format(3.1415926) #保留两位小数 print(str1) 执行以上代码,输出结果...
s="The %s's price id %4.2f"%('apple',2.5) print(s) s='%s %s %s'%(123,1.23,'abc') print(s) s='%r %r %r'%(123,1.23,'abc') print(s) s='123%c%c'%('a',97) print(s) s='%d%d'%(123,1.56) print(s) d未指定宽度是,数字原样转换,%d会将浮点数转换为整数。
Move the cursor to the beginning of the line requested and make that line visible. A request past the end of the file goes to the end. Clear any selection and update the line and column status. 提示完成 打开一个可滚动列表,允许选择关键字和属性。请参阅下面的 “编辑和导航”部分中的 Comple...