以上代码中,我们定义了一个名为truncate_float()的函数,该函数接受两个参数:num为要进行截断的浮点数,decimal_places为要保留的小数位数。函数内部通过将浮点数拆分为整数部分和小数部分,然后截断小数部分,并将结果返回。 使用示例: 代码语言:txt 复制 num = 3.141592653589793 decimal_places = 3 result = trunc...
':2,'Taobao':3}forname, numberintable.items():print('{0:10} ==> {1:10d}'.format(name, number))#输出内容如下:#Google ==> 1#Runoob ==> 2#Taobao ==> 3 f-string f-string是 python3.6之后版本添加的,称之为字面量格式化字符串,是新的格式化字符串的语法。 格式化字符串以f开头, 后面...
方法名描述str.capitalize()首字母大写,其余字符小写str.center(width[, fillchar])返回一个指定的宽度 width 居中的字符串,fillchar 为填充的字符,默认为空格str.count(sub, start= 0,end=len(string))统计子字符串在字符串中出现的次数str.encode(encoding=‘UTF-8’,errors=‘strict’)以指定的编码格式编码...
without 5 caring what kind, use isinstance(x, Number). 6 """ 7 __slots__ = () 8 9 # Concrete numeric types must provide their own hash implementation 10 __hash__ = None 11 12 13 ## Notes on Decimal 14 ## --- 15
='4.3' >>> num6='1/2' >>> print(num5.isdigit()) False >>> print(num5.isdecimal()) False >>> print(num5.isnumeric()) False >>> print(num6.isdigit()) False >>> print(num6.isdecimal()) False >>> print(num6.isnumeric()) False >>> is系列,正确返回True,否则为False >...
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...
Unlike integers, floats has both integer and decimal parts. And, the mininum width defined to the number is for both parts as a whole including ".". In the third statement, {:8.3f} truncates the decimal part into 3 places rounding off the last 2 digits. And, the number, now 12.235,...
fp.seekable() # 是否可以seekfp.truncate([size]) # 把文件裁成规定的大小,默认的是裁到当前文件操作标记的位置。for line in open('data'): print(line) # 使用for语句,比较适用于打开比较大的文件open('f.txt', encoding = 'latin-1') # Python3.x Unicode文本文件open('f.bin', 'rb') # ...
isalpha()如果 string 至少有一个字符并且所有字符都是字母则返回 True string.isdecimal()如果 string 只包含十进制数字则返回 True 否则返回 False. string.isdigit()如果 string 只包含数字则返回 True 否则返回 False. string.islower()如果 string 中包含至少一个区分大小写的字符,并且所有这些(区分大小写的)...
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...