将结果保存到 txt 文件 python

Question

I want to save these email results to my results.txt file in the directory.

def parseAddress():
    try:
        website = urllib2.urlopen(getAddress())
        html = website.read()

        addys = re.findall('''[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*@(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?''', html, flags=re.IGNORECASE)

        print addys

    except urllib2.HTTPError, err:
        print "Cannot retrieve URL: HTTP Error Code: ", err.code
    except urllib2.URLError, err:
        print "Cannot retrive URL: " + err.reason[1]

    # need to write the addys data to results.txt   
    with open('results.txt', 'w') as f:
       result_line = f.writelines(addys)

Answer 1

You mistakenly indented the "with" statement one space. This makes it subjective to an earlier block. I would think any self-respecting Python interpreter would flag this as not matching any earlier indentation, but it seems to be fouling your output.

Also, please consider adding some tracing print statements to see where your code did execute. That output alone can often show you the problem, or lead us to it. You should always provide actual output for us, rather than just a general description.

Answer 2

Use return addys at the end of your function. print will only output to your screen.

In order to retrieve addys , you would need to call the function in your with statement or create a variable that contains the result of parseAddress() .

You can save the memory that a variable would use by simply calling the function, like so:

with open('results.txt', 'w') as f:
    f.write ( parseAddress() )

Answer 3

You need to fix your indentation, which is important in Python as it is the only way to define a block of code.

You also have too many statements in your try block.

def parseAddress():
    website = None
    try:
        website = urllib2.urlopen(getAddress())
    except urllib2.HTTPError, err:
        print "Cannot retrieve URL: HTTP Error Code: ", err.code
    except urllib2.URLError, err:
        print "Cannot retrive URL: " + err.reason[1]

    if website is not None:
        html = website.read()
        addys = re.findall('''[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*@(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?''', html, flags=re.IGNORECASE)
        print addys

        # need to write the addys data to results.txt   
        with open('results.txt', 'w') as f:
            result_line = f.writelines(addys)