# 将 float 浮点型转化成 int 长整型
num_float = 3.5
print(num_float)
# 3.5
print(type(num_float))
# <class 'float'>
num_int = int(num_float)
print(num_int)
# 3
print(type(num_int))
# <class 'int'>

# 将 2,3 转化为复数
num_complex = complex(2,3)
print(num_complex)
# (2+3j)
print(type(num_complex))
# <class 'complex'>

# 将字符串转化为数字类型
str_num = '789'
num = eval(str_num)
print(num)
# 789
print(type(num))
# <class 'int'>

# 将整数转化为字符。
print(chr(65))
# A
print(chr(90))
# Z
print(chr(97))
# a
print(chr(122))
# z

# 将字符转化为整数。
print(ord('A'))
# 65