Category: Python Answers

Sometimes, we want to parallelize a simple Python loop.

In this article, we’ll look at how to parallelize a simple Python loop.

How to parallelize a simple Python loop?

To parallelize a simple Python loop, we can use the multiprocessing module.

For instance, we write

pool = multiprocessing.Pool(4)

out1, out2, out3 = zip(*pool.map(calc_stuff, range(0, 10 * offset, offset)))

to create a thread pool with 4 threads with

pool = multiprocessing.Pool(4)

And then we call pool.map to run the calc_stuff function in each thread`.

Conclusion

To parallelize a simple Python loop, we can use the multiprocessing module.

Sometimes, we want to get the maximum and minimum values for ints with Python.

In this article, we’ll look at how to get the maximum and minimum values for ints with Python.

How to get the maximum and minimum values for ints with Python?

To get the maximum and minimum values for ints with Python, we can use the sys.maxsize property.

For instance, we write

import sys

max_size = sys.maxsize
min_size = -sys.maxsize - 1

to get the max value with sys.maxsize.

And we get the min value with -sys.maxsize - 1.

Conclusion

To get the maximum and minimum values for ints with Python, we can use the sys.maxsize property.

Sometimes, we want to send an email with Gmail as provider using Python.

In this article, we’ll look at how to send an email with Gmail as provider using Python.

How to send an email with Gmail as provider using Python?

To send an email with Gmail as provider using Python, we can use smtplib.

For instance, we write

def send_email(user, pwd, recipient, subject, body):
    import smtplib

    FROM = user
    TO = recipient if isinstance(recipient, list) else [recipient]
    SUBJECT = subject
    TEXT = body

    message = """From: %s\nTo: %s\nSubject: %s\n\n%s
    """ % (FROM, ", ".join(TO), SUBJECT, TEXT)
    try:
        server = smtplib.SMTP("smtp.gmail.com", 587)
        server.ehlo()
        server.starttls()
        server.login(user, pwd)
        server.sendmail(FROM, TO, message)
        server.close()
        print('successfully sent the mail')
    except:
        print("failed to send mail")

to create the message message by putting the FROM, TO , SUBJECT and TEXT into the string.

Then we call smptlib.SMTP to connect to the server.

And then we call login to log in.

We call sendmail to send the message.

And then we call close to close the connection.

Conclusion

To send an email with Gmail as provider using Python, we can use smtplib.

Sometimes, we want to check what OS a script is running on with Python.

In this article, we’ll look at how to check what OS a script is running on with Python.

How to check what OS a script is running on with Python?

To check what OS a script is running on with Python, we can use the platform module.

For instance, we write

import platform

s = platform.system()
r = platform.release()

to call platform.system to get the OS name.

And we call platform.release to get the kernel version.

Conclusion

To check what OS a script is running on with Python, we can use the platform module.

Sometimes, we want to check whether a variable is an integer or not with Python.

In this article, we’ll look at how to check whether a variable is an integer or not with Python.

How to check whether a variable is an integer or not with Python?

To check whether a variable is an integer or not with Python, we can use the isinstance function.

For instance, we write

isinstance(foo, int)

to check if the value of variable foo is an int by calling isinstance with foo and int.

Conclusion

To check whether a variable is an integer or not with Python, we can use the isinstance function.