the return value is the same object. 7 """ 8 def capitalize(self): 9 """ 首字母变大写 """ 10 """ 11 S.capitalize() -> string 12 13 Return a copy of the string S with only its first character 14 capitalized
an integer (may be a long integer)."""passdeftruncate(self, size=None):#real signature unknown; restored from __doc__截断数据,仅保留指定之前数据"""truncate([size]) -> None. Truncate the file to at most
truncate to_csv bool at clip radd to_markdown value_counts first isna between_time replace sample idxmin div iloc add_suffix pipe to_sql items max rsub flags sem to_string to_excel prod fillna backfill align pct_change expanding nsmallest append attrs rmod bfill ndim rank floordiv unstack...
The part after the "." (3) truncates the decimal part (2346) upto the given number. In this case, 2346 is truncated after 3 places. Remaining numbers (46) is rounded off outputting 235. For keyword arguments Keyword arguments We've used the same example from above to show the differe...
(如:FTP发送上传ISO镜像文件,linux可忽略,windows处理二进制文件时需标注) # # rb # wb # ab #操作:读写追加、移动seek、tell truncate #新建文件 f =open("test.txt","w") #写模式,新建一个文件对象 f.write("the first line\n") #写入一行 f.write("the second line\n") f.write("the third...
SIGXFSZ:当进程试图使用write()或truncate()函数,但却超出了进程的文件大小资源限制RLIMIT_FSIZE产生 signal_install_handlers通过PyImport_ImportModule导入了_signal信号模块,该结构体具体实现如下 // Modules/signalmodule.c static struct PyModuleDef signalmodule = { PyModuleDef_HEAD_INIT, "_signal", // 模...
文件对象有一些额外的方法,如isatty()和truncate()其中较不频繁地使用的; 有关文件对象的完整指南,请参阅“库参考”。 7.2.2 使用保存结构化数据json 可以轻松地将字符串写入文件并从文件中读取。数字需要更多的努力,因为该read()方法只返回字符串,必须将其传递给类似的函数int(),它接受类似字符串'123' 并返回...
12、 truncates naturally)%g / %G The shorter of %e and %f/%E% and %F% Percent character ( % ) unescapeda New in Python 2.0; likely unique only to Python. b %u/%o/%x/%X of negative int will return a signed string in Python 2.4+.Table B.6. Format Operator Auxiliary DirectivesSymbol...
reading text, synonym of'rt'). For binary read-write access, the mode'w+b'opens and truncate...
HAVE_TRUNCATE = "1" HAVE_TZNAME = "0" HAVE_UCS4_TCL = "0" HAVE_UNAME = "1" HAVE_UNISTD_H = "1" HAVE_UNLINKAT = "1" HAVE_USABLE_WCHAR_T = "0" HAVE_UTIL_H = "1" HAVE_UTIMENSAT = "1" HAVE_UTIMES = "1" HAVE_UTIME_H = "1" HAVE_UUID_CREATE = "0" HAVE_UUID_ENC...