A list of built-in method: can only give a list with
lt = [1, 2, 3，4]
| Index values / value index modifier |
lt[0] = 2 print(lt) |
| Index sliced |
print(lt[0:1]) |
| Member operator in / not in |
print(2 in lt) print(2 not in lt) |
| for loop |
for i in lt：print（i） |
| len length |
print (referred to as (LT)) |
| append (): value added |
lt.append(4) print(lt) |
| sort (): Sort |
lt.sort() print(lt) |
| reverse (): Reverse |
lt = [1, 2, 3]lt.reverse()print(lt) |
| index (): Gets the element index |
print(lt.index(2)) |
| clear (): Empty list |
lt.clear() print(lt) |
| copy (): Copy |
lt = [1, 2, 3] lt1 = lt.copy() print(lt1) |
| extend (): extended list |
lt1 = [1, 2, 3] lt2 = [1, 5, 6] lt1.extend(lt2) print(lt1) |
| remove (): removed |
lt = [1, 2, 3] lt.remove(3) print(lt) |
| insert (): according to the index value inserted |
lt = [1, 2, 3] lt.insert(0, 1.5) print(lt) |
Dictionary built-in method
banzhuren_info_dic = {'name': 'a', 'height': 21313, 'weight': 1231, 'hobby_list': ['sdfsdf', 'ads', 'qrt']}
| Press the key value |
print(banzhuren_info_dic['height']) |
| Press the key to modify value |
banzhuren_info_dic [ 'height'] = banzhuren_info_dic [ 'height'] + 1 print (banzhuren_info_dic [ 'height']) banzhuren_info_dic [ 'age'] = 30 |
| Press the key added value |
anzhuren_info_dic['age'] = 30 print(banzhuren_info_dic) |
| Member operator (comparison is key) |
print('age' in banzhuren_info_dic) |
| The for loop (for key cycle) |
for i in banzhuren_info_dic: print(i) |
| keys() |
print (banzhuren_info_dic.keys ()) |
| values() |
print(banzhuren_info_dic.values()) |
| items() |
print(banzhuren_info_dic.items()) |
| get (): Value |
print(banzhuren_info_dic.get('height', 150)) |
| update() |
dic1 = {'a':1} dic2 = {'b':2} dic1.update(dic2) print(dic1) |
| setdefault(): |
dic1 = {'a': 1} dic1.setdefault('a', 2) print(dic1) |
s='nbx qwer'
| Index values |
print(s[0]) |
| slice |
print(s[0:4]) |
| Member operator |
print('nbx' in s) print('nbx1' in s) |
| for loop |
for i in s: print(i) |
| Only () |
print (referred to as (a)) |
| strip() |
print(s.strip('n* ')) |
| lstrip()/rstrip() |
Ditto |
| find()/index() |
s = 'nick'print(s.find('a')) |
| join() |
print('*'.join(['a', 'b', 'c'])) |
| split() |
s = 'abc' print(s.split('*')) |
| Center / bright / rjust |
print(s.center(50, '-')) |
| isdigit()/isalpha() |
s = 'a'print(s.isdigit()) print(s.isalpha())#判断是否纯 |
| count() |
s = 'nick nick' print(s.count('nick')) |