Perform a string formatting operation. The string on which this method is called can contain literal text or replacement fields delimited by braces {}. Each replacement field contains either the numeric index of a positional argument, or the name of a keyword argument. Returns a copy of the st...
浮点型(float) 布尔型(bool) 复数性(complex) 字符型(string):表示数据组成是字符 列表(list):用来表示一组有序元素,后期数据可以修改 ['A','B','C'] 元组(tuple):用来表示一组有序元素,后期数据不可修改 ('A','B','C','1') 集合(set):一组数据无序不重复元素 set([1,2,3,4]) 字典(dictio...
Example 10: Dynamic formatting using format() # dynamic string format template string = "{:{fill}{align}{width}}" # passing format codes as arguments print(string.format('cat', fill='*', align='^', width=5)) # dynamic float format template num = "{:{align}{width}.{precision}f}"...
33. TypeError: list indices must be integers or slices 列表的下标必须是整数或者是切片。 >>> a = ["aaa", "bbb", "ccc"] >>> a['1'] Traceback (most recent call last): File "<stdin>", line 1, in <module> TypeError: list indices must be integers or slices, not str 上面的错误...
# Selects an alternate output form for certain presentation types, such as integers # 0 Causes values to be padded on the left with zeros instead of ASCII space characters 0 width Specifies the minimum width of the output Integer value grouping_option Specifies a grouping character for numeric ...
The conversion type refers to the the single-character type code that Python uses. The codes that we’ll be using here aresfor string,dto display decimal integers (10-base), andfwhich we’ll use to display floats with decimal places. You can read more about theFormat-Specification Mini-Lan...
(value1, value2) : Can be integers, floating point numeric constants, strings, characters and even variables. Only difference is, the number of values passed as parameters in format() method must be equal to the number of placeholders created in the string. Errors and Exceptions :IndexError ...
def__init__(self,x,y):self.x=float(x)# ② self.y=float(y)def__iter__(self):return(iforiin(self.x,self.y))# ③ def__repr__(self):class_name=type(self).__name__return'{}({!r}, {!r})'.format(class_name,*self)# ④ ...
Basic Input, Output, and String Formatting in Python Python’s F-String for String Interpolation and Formatting Splitting, Concatenating, and Joining Strings in Python How to Read Python Input as Integers How to Check if a Python String Contains a Substring ...
We've actually already seen combining types:.N%is just a variation of the.Nftype that works on floating point numbers and integers. >>>n=.48>>>print(f"{n*100:.2f}")48.00>>>print(f"{n:.2%}")48.00% Formatting strings The format specifiers for strings are all about alignment. I us...