开班前自学--元组

元组 tuple

• 元组可以查询

  tu = ('front','ove',['library','cloudpark','CC+'],'2019.03.01','09:06')
  print(tu[-2])                   # 2019.03.01
  print(tu[:5:2])                 # ('front', ['library', 'cloudpark', 'CC+'], '09:06')
  print(len(tu))                  # 5
  print(tu.index('ove'))          # 1
  print(tu.count('2019.03.01'))   # 1

   

• 元组不可编辑，即不能进行增加，更改，删除
• 元组内如有列表，列表可修改 

tu = ('front','ove',['library','cloudpark','CC+'],'2019.03.01','09:06')
tu[2].append('shenzhen')
print(tu)   # ('front', 'ove', ['library', 'cloudpark', 'CC+', 'shenzhen'], '2019.03.01', '09:06')

tu = ('front','ove',['library','cloudpark','CC+'],'2019.03.01','09:06')
tu[2].pop(2)         # 删除'CC+'
print(tu)            # ('front', 'ove', ['library', 'cloudpark'], '2019.03.01', '09:06')

标签：01,2019.03,tu,library,开班,09,print,自学,元组
来源： https://www.cnblogs.com/yingpeng/p/10455743.html