如何打印正在执行的python脚本的每一行(包括控制台)? [英] How print every line of a python script as its being executed (including the console)?

问题描述

我想在执行脚本时打印每行python脚本，并在执行每一行时打印来自控制台的日志.

I'd like to print every line of python script as it's being executed, as well as the log from the console as every line is being executed.

例如，对于此脚本:

import time
print 'hello'
time.sleep(3)
print 'goodbye'

我希望它在控制台中生成以下内容:

I'd like it to generate the following in the console:

line 1: import time
line 2: print 'hello'
hello
line 3: time.sleep(3)
line 4: print 'goodbye'
goodbye

我的尝试见下文

import subprocess as subp

python_string = """
import sys
import inspect

class SetTrace(object):
    def __init__(self, func):
        self.func = func

    def __enter__(self):
        sys.settrace(self.func)
        return self

    def __exit__(self, ext_type, exc_value, traceback):
        sys.settrace(None)

def monitor(frame, event, arg):
    if event == "line":
        file_dict = dict(enumerate("{}".split("|")))
        line_number = frame.f_lineno-25
        if line_number > 0:
           print "line " + str(line_number)+ ": " + file_dict[line_number]
    return monitor

def run():
    {}

with SetTrace(monitor):
    run()

"""
python_string_example = """
    import time
    print 'hello'
    time.sleep(3)
    print 'goodbye'
"""
python_string = python_string.format("|".join([i.strip() for i in python_string_example.split("\n")]),python_string_example)


proc = subp.Popen(['python', '-'], stdin=subp.PIPE,stdout=subp.PIPE, stderr=subp.STDOUT)
proc.stdin.write(python_string)
proc.stdin.close()
for line in proc.stdout:
    print '{}'.format(line.strip())
proc.wait()

尽管这会产生所需的结果，但在执行整个脚本之后会产生输出.这也是一个非常糟糕的hack，因为它很可能会根据python_string_base是什么而中断

Although, this produces the desired result, it produces the output after the entire script is executed. It also is a very bad hack since it will most likely break depending on what python_string_base is

推荐答案

您可以使用跟踪模块为此

如果您的4行代码位于tmp.py中，则将其称为

If your 4 lines of code are in tmp.py, calling it as

python -m trace -t tmp.py 

产生以下输出

 --- modulename: tmp, funcname: <module>
tmp.py(1): import time
tmp.py(2): print 'hello'
hello
tmp.py(3): time.sleep(3)
tmp.py(4): print 'goodbye'
goodbye
 --- modulename: trace, funcname: _unsettrace
trace.py(80):         sys.settrace(None)

这篇关于如何打印正在执行的python脚本的每一行(包括控制台)?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！