查看數據類型：type()

類型轉換：int(),float(),char(),ord(),str(),bool()

#coding:utf-8
#/usr/bin/python
"""
2018-11-03
dinghanhua
查看數據類型，類型轉換
"""

"""查看數據類型type()"""
print(type(1),type(3.14),
      type(‘a‘),type(‘abd‘),
      type((1,2,3)),type(True),type(None),
      type([]),type({1,2}),type({1:‘monday‘,2:‘tuesday
 
‘}))

"""強制類型轉換"""
"""整數，浮點數，ascii碼轉換：int(),float(),chr(),ord()"""
f = 3.14
print(‘f=%f,int(f)=%d ‘%(f,int(f)))
print(float(int(f)))
print(chr(65)) #整數轉化為ascii碼字符
print(ord(‘a‘)) #ascii字符轉化為整數

‘‘‘轉成布爾類型 bool()‘‘‘
print(bool(‘1‘),bool(‘0‘),bool([0])) #True
print(bool(‘‘),bool(0),bool([]),bool(()),bool({})) #
 
False

‘‘‘字符串 str()‘‘‘
print(type(str(f)))

‘‘‘特殊字符-轉義字符 r忽略轉義字符‘‘‘
print(‘abc\nghigk\tjfwejf\\fjewfjoewjfjfwejgwe\‘jfwifoe?‘)
print(r‘abc\nghigk\tjfwejf\\fjewfjoewjfjfwejgwe\‘jfwifoe?‘)
print(‘c:\\user\\pycharm‘) #\\轉義\
print(r‘c:\user\pycharm‘) #用r無需加轉義
print("i‘m busy") #裏面帶‘的用"
print(‘he said:"ok"
 
‘) #裏面帶"用‘

the end!

python入門6 python查看數據類型及類型轉換