变量数据类型

Python 金融入门

Adina Howe

Professor

Python 数据类型

要识别类型，可使用函数 type()：

type(variable_name)

pe_ratio = 40
print(type(pe_ratio))

<class 'int'>

x = 5
print(x * 3)

print(x + 3)

y = 'stock'
print(y * 3)

'stockstockstock'

print(y + 3)

TypeError: must be str, not int

pi = 3.14159
print(type(pi))

<class 'float'>

pi_string = str(pi)
print(type(pi_string))

<class 'str'>

print('I love to eat ' + pi_string + '!')

I love to eat 3.14159!

Python 金融入门