Python函数在使用的时候有几大分类,其中以int函数,float函数和str函数的应用最为广泛。下面我们就看看具体的环境中如何进行相关的函数代码的编写。下面我们先来看看int函数在Python函数中的作用。
(1)把符合数学格式的数字型字符串转换成整数
(2)把浮点数转换成整数,但是只是简单的取整,而非四舍五入。
举例:
- aa = int("124") #Correct
- print "aa = ", aa #result=124
- bb = int(123.45) #correct
- print "bb = ", bb #result=123
- cc = int("-123.45") #Error,Can't Convert to int
- print "cc = ",cc
- dd = int("34a") #Error,Can't Convert to int
- print "dd = ",dd
- ee = int("12.3") #Error,Can't Convert to int
- print ee
float函数将整数和字符串转换成浮点数。
举例:
- aa = float("124") #Correct
- print "aa = ", aa #result = 124.0
- bb = float("123.45") #Correct
- print "bb = ", bb #result = 123.45
- cc = float(-123.6) #Correct
- print "cc = ",cc #result = -123.6
- dd = float("-123.34") #Correct
- print "dd = ",dd #result = -123.34
- ee = float('123v') #Error,Can't Convert to float
- print ee
Python str函数将数字转换成字符举例:
- aa = str(123.4) #Correct
- print aa #result = '123.4'
- bb = str(-124.a) #SyntaxError: invalid syntax
- print bb
- cc = str("-123.45") #correct
- print cc #result = '-123.45'
- dd = str('ddd') #correct
- print dd #result = ddd
- ee = str(-124.3) #correct
- print ee #result = -124.3
以上就是对Python函数的三大类进行的分析,希望大家有所收获。
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