这个过程有点非传统，但适用于所有的python版本，

假设你想在一个'if'条件中执行一个名为' recommendation .py'的脚本，然后使用，

if condition:
       import recommend

技术是不同的，但有效!

你不应该这么做。相反,做:

test1.py:

 def print_test():
      print "I am a test"
      print "see! I do nothing productive."

service.py

#near the top
from test1 import print_test
#lots of stuff here
print_test()

I found runpy standard library most convenient. Why? You have to consider case when error raised in test1.py script, and with runpy you are able to handle this in service.py code. Both traceback text (to write error in log file for future investigation) and error object (to handle error depends on its type): when with subprocess library I wasn't able to promote error object from test1.py to service.py, only traceback output. Also, comparing to "import test1.py as a module" solution, runpy is better cause you have no need to wrap code of test1.py into def main(): function.

代码片段为例，使用traceback模块捕获最后一个错误文本:

import traceback
import runpy #https://www.tutorialspoint.com/locating-and-executing-python-modules-runpy

from datetime import datetime


try:
    runpy.run_path("./E4P_PPP_2.py")
except Exception as e:
    print("Error occurred during execution at " + str(datetime.now().date()) + " {}".format(datetime.now().time()))
    print(traceback.format_exc())
    print(e)

根据上面的例子，这是最好的方法:

# test1.py

def foo():
    print("hellow")

# test2.py
from test1 import foo # might be different if in different folder.
foo()

但根据标题，使用os.startfile(“path”)是最好的方法，因为它很小，而且它可以工作。这将执行指定的文件。我的python版本是3。x +。

第一次使用import test1 -它将执行脚本。对于以后的调用，将脚本视为导入的模块，并调用reload(test1)方法。

当reload(module)执行时: Python模块的代码被重新编译，模块级代码被重新执行，定义一组新的对象，这些对象被绑定到模块字典中的名称。扩展模块的init函数没有被调用

一个简单的检查sys。模块可用于调用适当的操作。要继续将脚本名称引用为字符串('test1')，请使用内置的'import()'。

import sys
if sys.modules.has_key['test1']:
    reload(sys.modules['test1'])
else:
    __import__('test1')

我更喜欢runpy:

#!/usr/bin/env python
# coding: utf-8

import runpy

runpy.run_path(path_name='script-01.py')
runpy.run_path(path_name='script-02.py')
runpy.run_path(path_name='script-03.py')