Python -Code im Bash -Skript
#!/bin/sh
python disk.py
DreamCoder
#!/bin/sh
python disk.pyYou can use heredoc if you want to keep the source of both bash and python scripts together. For example, say the following are the contents of a file called pyinbash.sh:
#!/bin/bash
echo "Executing a bash statement"
export bashvar=100
cat << EOF > pyscript.py
#!/usr/bin/python
import subprocess
print 'Hello python'
subprocess.call(["echo","$bashvar"])
EOF
chmod 755 pyscript.py
./pyscript.py
Now running the pyinbash.sh will yield:
$ chmod 755 pyinbash.sh
$ ./pyinbash.sh
ExeThe simplest approach is to just save the python script as, for example script.py and then either call it from the bash script, or call it after the bash script:
#!/usr/bin/env bash
echo "This is the bash script" &&
/path/to/script.py
Or
script.sh && script.pyThere are ways to do this safely, but the simplest way would be to create the files in the current working directory or in a dedicated directory in the home directory.
cat >dopythonstuff <<END
...
END
python dopythonstuff
rm dopythonstuff#!/bin/bash
# Here are some embedded Python examples using Python3.
# They are put into functions for separation and clarity.
# Simple usage, only using python to print the date.
# This is not really a good example, because the `date`
# command works just as well.
function date_time {
python3 - <<END
from datetime import datetime
print('Current date:')
print(datetime.now())
END
}
# Call the python code.
date_time
# Sending a variable to Python from BASH
function env_args {
# Put an environment arg into Python.
# Must be on the same line as the command.
TESTARG="My Value" python3 - <<END
from os import environ
print('Your environment arg: {}'.format(environ.get('TESTARG', 'missing!')))
END
}
env_args
# Retrieve output from Python and put it into a BASH variable.
# This uses a subshell to retrieve whatever python prints out.
function val_from_python {
# Get a python value from BASH.
pythonval="$(python3 - <<END
import os
print('cwd: {}'.format(os.getcwd()))
END
)"
echo "Python value is: $pythonval"
}
val_from_python
# You can put small python snippets directly into your shell files.
# Here's an example using `urllib` to download some html, and then
# using it in BASH.
# (granted that you could do this in Python itself,
# or you could write it all in BASH, but this is just an example.)
function python_power {
# Grab the html from python.org's PEP8 page and save it to a bash variable.
# On error, the output will be a basic HTML page with the error message.
local pythonval="$(python3 - <<END
from urllib import request
try:
resp = request.urlopen('http://legacy.python.org/dev/peps/pep-0008/')
data = resp.read().decode('utf-8')
print(data)
except Exception as ex:
print("""
<html>\n<head>\n<title>Error in python_power</title>\n</head>\n
<body>\nThere was an error retrieving that page: {}\n</body>
""".format(ex))
END
)"
# Print the content so it can be used by other commands.
# (you also could've saved it to a global variable.)
echo $pythonval
}
# Direct the output of this python function to a file.
# The html will not be styled correctly, because no css files are downloaded.
# But the point here is that you can have the full power of python without
# writing separate scripts. Small python snippets can be embedded and used
# from BASH itself.
outfile='pep8.html'
python_power > $outfile
if [[ -f $outfile ]]; then
echo "New file was created: $outfile"
google-chrome $outfile
else
echo "Unable to create new file: $outfile"
fi#!/bin/bash
/usr/bin/python /absolute/path/to/your/disk.py#!/bin/bash
python3
print("Hello World")
exit()
echo "The execution is completed"*2 Example of the dangers of temp files. DO NOT USE THIS CODE
cat >/tmp/python-script <<END
for i in range(10):
print(i)
END
python /tmp/python-script
If someone else creates /tmp/python-script first, this shell script won't even stop if it fails to overwrite the file. A malicious user on the system could make a harmful Python script which will run instead of the intended script.#!/bin/bash
PYCMD=$(cat <<EOF
from datetime import datetime
first_day_of_new_year = datetime(2022, 1, 1)
days_remaining = (first_day_of_new_year - datetime.now()).days
print('{} days remaining in this year'.format(days_remaining))
EOF
)
python3 -c "$PYCMD"#!/bin/bash
MYSTRING="Do something in bash"
echo $MYSTRING
python - << EOF
myPyString = "Do something on python"
print myPyString
EOF
echo "Back to bash"