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
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,...
='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 >...
fromfunctoolsimportpartial# print(int.__doc__)"""int([x]) -> integerint(x, base=10) -> integerConvert a number or string to an integer, or return 0 if no argumentsare given. If x is a number, return x.__int__(). For floating pointnumbers, this truncates towards zero.If x ...
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') # ...
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...
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)...