Python函數(shù)中三大主要應(yīng)用形式
Python函數(shù)在使用的時候有幾大分類,其中以int函數(shù),float函數(shù)和str函數(shù)的應(yīng)用最為廣泛。下面我們就看看具體的環(huán)境中如何進行相關(guān)的函數(shù)代碼的編寫。下面我們先來看看int函數(shù)在Python函數(shù)中的作用。
(1)把符合數(shù)學(xué)格式的數(shù)字型字符串轉(zhuǎn)換成整數(shù)
(2)把浮點數(shù)轉(zhuǎn)換成整數(shù),但是只是簡單的取整,而非四舍五入。
舉例:
- 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函數(shù)將整數(shù)和字符串轉(zhuǎn)換成浮點數(shù)。
舉例:
- 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函數(shù)將數(shù)字轉(zhuǎn)換成字符舉例:
- 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
以上就是對Python函數(shù)的三大類進行的分析,希望大家有所收獲。
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