Python基础06—Python基础数据类型（列表的基本操作）（2022年）

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1. 列表的基本操作

name_list = ["python","mysql","Py小白雨"]

# append追加
name_list.append('flask')
print(name_list)

# count制定字符出现几次
name_list.append('Py小白雨')
name_list.append('Py小白雨')
name_list.append('Py小白雨')
print(name_list.count('zhang'))

# extend可扩展，批量往里加数据
name = ["flask", "django", "go"]
name_list.extend(name)
print(name_list)

# index找到字符所在的位置
print(name_list.index('Py小白雨'))

# insert插入，往索引里面插入值
name_list.insert(1, "Py小白雨")
print(name_list)

# pop在原列表中移除掉最后一个元素，并赋值给另一个变量
name = name_list.pop()
print(name)

# remove移除,只移除从左边找到的第一个
name_list.remove('Py小白雨')
print(name_list)

# reverse反转
name_list.reverse()
print(name_list)

# del删除其中元素,删除1到3之间的
del name_list[1:3]
print(name_list)

2. 列表的索引

name_list = ["python","mysql","Py小白雨"]
print(name_list[0])
# python

3. 列表的切片

name_list = ["python","mysql","Py小白雨"]
print(name_list[0:2])
# ['python', 'mysql']

4. 列表的总长度（len）

name_list = ["python","mysql","Py小白雨"]
print(len(name_list))
# 3 

5. 列表的for循环

name_list = ["python","mysql","Py小白雨"]
for i in name_list:
    print(i)
#python
#mysql
#Py小白雨