檢視資料型別：type()

型別轉換：int(),float(),char(),ord(),str(),bool()

#coding:utf-8
#/usr/bin/python
"""
2018-11-03
dinghanhua
檢視資料型別，型別轉換
"""

"""檢視資料型別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'}))

"""強制型別轉換"""
"""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碼字元
print(ord('a')) #ascii字元轉化為整數

'''轉成布林型別 bool()'''
print(bool('1'),bool('0'),bool([0])) #True
print(bool(''),bool(0),bool([]),bool(()),bool({})) #
 
False

'''字串 str()'''
print(type(str(f)))

'''特殊字元-轉義字元 r忽略轉義字元'''
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") #裡面帶'的用"
print('he said:"ok"
 
') #裡面帶"用'

the end!