如何在Powershell中运行python 2.7的代码？ （默认程序是3.7）

Question

我试图在Powershell上运行Python 2.7代码，但是由于3.7是我安装的主程序，所以它不起作用。我需要运行哪几行代码才能切换到2.7？

我尝试使用别名python = python2.7，但仅适用于Mac OS。

x = "There are %d types of people." % 10
binary = "binary"
do_not = "don't"
y = "Those who know %s and those who %s." % (binary, do_not)

print x
print y

print "I said: %r." % x
print "I also said: '%s'." % y

hilarious = False
joke_evaluation = "Isn't that joke so funny?! %r"

print joke_evaluation % hilarious

w = "This is the left side of... "
e = "a string with a right side!"

print w + e 

我尝试运行python 5.py，这是我得到的：

 File "5.py", line 6
    print x
          ^
SyntaxError: Missing parentheses in call to 'print'. Did you mean print(x)?