Python是有变量类型的，而且会强制检查变量类型。
内置的变量类型有如下几种：

#整型
integer_number = 90
 
#浮点
float_number = 90.4
 
#复数
complex_number = 10 + 10j
 
#list 序列
sample_list = [1,2,3,'abc']
 
#dictionary 字典
sample_dic = {"key":value, 2:3}
 
#tuple 只读的序列
sample_tuple = (1,3,"ab")
 
#嵌套
sample_nest = [(1,2,3),{1:2,3:4,'key':[1,2]},3]

'str str'.split() # ['str', 'str']
 
# 1..is_integer()   # True
 
# is_integer(1)     # True
 
# 1.0.is_integer()  # False
 
[3,2,1].sort()    # [1,2,3]
 
sort([2,1,3])     # [1,2,3]

flag1 = some_value
flag2 = other_value
if flag1:
    do_function_1()
elif flag2:
    do_function_2()
else:
    do_function_3()

for i in range(0, 10):
    print(i)
 
for i in ['a','b','c','dd','eee']:
    print(i)

Python 带有很丰富的标准库，给开发带来了很大的方便。