Skip to main content

Debug print statements, done right. E.g. show(x)

Project description

PyPI Package latest release PyPI Package monthly downloads Supported versions Supported implementations Wheel packaging support Test line coverage
from show import *

x = 12
nums = list(range(4))

show(x, nums)

yields:

x: 12  nums: [0, 1, 2, 3]

Output is self-labeled, so you don’t spend time doing that yourself.

Debug Printing

Logging, assertions, unit tests, and interactive debuggers are all great tools. But sometimes you just need to print values as a program runs to see what’s going on. Every language has features to print text, but they’re rarely customized for printing debugging information. show is. It provides a simple, DRY mechanism to “show what’s going on.”

Sometimes programs print so that users can see things, and sometimes they print so that developers can. show() is for developers, helping rapidly print the current state of variables in ways that easily identify what value is being printed, without a lot of wasted effort. It replaces the craptastic repetitiveness of:

print "x: {0!r}".format(x)

with:

show(x)

And Much More

While avoiding a few extra characters of typing and a little extra program complexity is nice (very nice, actually), show does much more. As just a taste, show.changed() displays local values that have changed since it was last run:

def f():
    x = 4
    show.changed()
    x += 1
    retval = x * 3
    show.changed()
    return retval

When run will display:

x: 4
x: 5  retval: 15

Decorate a function with @show.inout and it will show you the input parameters as the function is called, and then the return value later.:

@show.inout
def g(a):
    b = 3
    a += b
    show.changed()
    return a

g()

Displays:

g(a=4)
a: 7  b: 3
g(a=4) -> 7

And of course show does normal output too, just like say (with all of its high-level text formatting):

wizard = "Gandalf"
show("You have no power here, {wizard}!")

Prints:

You have no power here, Gandalf!

Just like you knew it would.

Long story short, show is working toward being a full-featured debugging companion that prints the maximum amount of useful information with the minimum amount of fuss.

For this and much more, see the full documentation at Read the Docs.

Project details


Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Source Distributions

show-1.2.3.zip (32.3 kB view hashes)

Uploaded Source

show-1.2.3.tar.gz (26.1 kB view hashes)

Uploaded Source

Built Distribution

show-1.2.3-py2.py3-none-any.whl (20.2 kB view hashes)

Uploaded Python 2 Python 3

Supported by

AWS AWS Cloud computing and Security Sponsor Datadog Datadog Monitoring Fastly Fastly CDN Google Google Download Analytics Microsoft Microsoft PSF Sponsor Pingdom Pingdom Monitoring Sentry Sentry Error logging StatusPage StatusPage Status page