Python快速入门

PyCharm 常用快捷键

复制：Ctrl + d

删除：Ctrl + y

撤回：Ctrl + z

注释：?Ctrl + /

方法跳转：Ctrl + B

最近编辑的文件 Ctrl +e

格式化：Ctrl + Alt + l? (个人修改成Ctrl + Shift + f)

换下一行：Shift + Enter

万能搜素：Shift +Shift

全局关键字搜索：Alt + Shift +r

错误代码修正提示：Alt +Enter

选中代码生成函数：Ctrl + Alt + m

选中代码生成try-except等 Ctrl +?Alt + t

# 变量声明
name = "hello"

age = 19

price = 13.45

is_true = True

# 字符串截取
print(name[0:2])
# 查看数据类型
print(type(name), type(age), type(price), type(is_true))

# 数组
a = array = [1, 2, 3, 4, 5]
# 索引操作数组
print(array[0], array[3])
# 添加元素
array.append(6)
array.extend(["a", "b", 90])
array.insert(0, "test")
# 替换2，下标从1开始，闭头开尾
array[2:5] = [7, 8, 9]

print(array)
# 遍历数组,不换行打印
for i in array:
    print(i, end='')

print()
print("----------------------------")

# map
map = {"key1": 123, "key2": "ldj"}

# 遍历map
for key in map.keys():
    print(key)

print()
print("----------------------------")

for value in map.values():
    print(value)

print()
print("----------------------------")

for kv in map.items():
    print(kv)