Python list List is the most basic data structures, is the most frequently used type of data in Python, List elements in the list need not have the same type, very convenient to use. Now come to experience the basic operation of the List list.
Basic operation set list
List of basic operation (=, copy, +, *, len, in)
1) = Assignment
list01 = [10, 20, 30, 40, 50, 60, 70, 80, 90]
list02 = list01 # =赋值，把list01赋给list02
print(list02)
list03 = list01.copy() # 使用copy把list01的值给list03
print(list03)
Note: = and copy are essentially different!
list assignment
2) + List collection merge two
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list01 = [1, 2, 3]
list02 = [4, 5, 6]
print(list01 + list02)
The combined list
3) Let the set of repeated many times List *
list01 = ["I", "love", "Python"]
print(list01 * 3)
Repeat the set list
4) len returns the number of list elements in a set
list01 = [10, 20, 30, 40, 50, 60, 70, 80, 90]
print("list01的元素个数为：", len(list01))
list the basic operation
5) in member operator, determines whether a certain element in the List
list01 = [10, 20, 30, 40, 50, 66]
print("40是否在list01中：", 40 in list01)
print("70是否在list01中：", 70 in list01)
list members of the judge
List collection to add elements (append, insert, enxtend)
Defined list01, list02, and add elements
list01 = [10, 20, 30, 40, 50, 60]
list02 = []
1) using the append method to add elements to List as a whole, by default added to the end of the list List
list01.append("70")
print(list01)
list02.append("BBB")
print(list02)
list elements are added
2) the use of added insert may be inserted to the specified location
list01.insert(1, 15)
print(list01)
list02.insert(1, "CCC")
print(list02)
Operation list
3) Use enxtend added, a plurality of additional one-time value in the other sequence (at the end of the list with a new list of the original extended list)
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list02.extend(["DDD", "EEE", "FFF"])
print(list02)
list01.extend(list02) # extend是将List02中的每一个值依次添加至List01列表的末尾
print(list01)
Adding list
List remove elements (remove, pop, del, clear)
1) remove delete a specific element value, a default deletion is the first element of the same elements is not given to the element
list01 = [10, 20, 30, 40, 50, 60, 30]
list01.remove(30)
print(list01)
list remove elements
2) pop pop elements, when there is no index number () Removes the last element in the default
list01 = [10, 20, 30, 40, 50, 60, 30]
list01.pop(1) # 删除第二个元素
print(list01)
list01.pop()
print(list01) # 默认情况下删除最后一个元素
Delete list
**3）del 删除列表中指定位置的元素
list01 = [10, 20, 30, 40, 50, 60, 30]
# del list01[1] # 删除第二个元素
# print(list01)
del list01[1:5] # 删除第二个到第五个
print(list01)
list操作
4）clear 清空列表中的所有元素
list01 = [10, 20, 30, 44, 50, 66, 30]
list01.clear() # 删除list列表中所有的元素
print(list01)
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list清空
以上就是List列表最最常用到的基础操作，当然方法还有很多，关注IT教头王进，一起学Python。