08-12-2015
In Python the assignment operator `=' never copies data. Whatever is at the left of the `=' is a binding label to a value, not a variable per se. This is significant, since moving labels do not produce another variable.
I recommend you watch
Ned Batchelder -
Facts and Myths about Python names and values - PyCon 2015 if you are interested on it.
At 15:50 you'll get presentation related to your query, but I would watch it from the beginning since the concept of binding and rebinding labels builds from understanding mutable and immutable values.
Hope it helps.
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LEARN ABOUT DEBIAN
python-coverage
PYTHON-COVERAGE(1) General Commands Manual PYTHON-COVERAGE(1)
NAME
python-coverage - measure code coverage of Python program execution
SYNOPSIS
python-coverage -x module.py [ARG...]
python-coverage -e
python-coverage -r [-m]
python-coverage -a [file...]
DESCRIPTION
python-coverage executes a Python program and measures which of its statements are executed and which are not. It stores the information
in the file .coverage in the current working directory.
OPTIONS
-e Erase the .coverage file.
-x Execute a Python module, giving it the remaining command line arguments.
-r Produce a coverage report.
-m With -r, show the line numbers that were missed by the execution.
-a Annotate source files. For each source file foo, produce foo,cover, with executed lines prefixed by ">" and non-executed by "!".
--help Produce a help summary. It might be more helpful than this manual page.
AUTHOR
The python-coverage command is a one-line Python script which calls the coverage.py Python module to do all the work. The module was rigi-
nally developed by Gareth Rees, and is now developed by Ned Batchelder. The module's home page is
http://www.nedbatchelder.com/code/modules/coverage.html.
This manual page was cobbled together by Lars Wirzenius for Debian, by copy-pasting from the help texts from the module.
PYTHON-COVERAGE(1)