Where does python look for to load a module or package?

-python looks module or packages in each directory listed in sys.path list. First element is empty string. It means, python search module in current directory first.
-Add directory where package is residing in PYTHONPATH environment variable (format is similar to PATH variable)

import sys

sys.path
Out[10]:
['',
 '/home/nansari',
 '/home/nansari/pylearning',
 '/home/nansari/anaconda3/lib/python36.zip',
 '/home/nansari/anaconda3/lib/python3.6',
 '/home/nansari/anaconda3/lib/python3.6/lib-dynload',
 '/home/nansari/anaconda3/lib/python3.6/site-packages',
 '/home/nansari/anaconda3/lib/python3.6/site-packages/IPython/extensions',
 '/home/nansari/.ipython']

Comments

Post a Comment

Popular posts from this blog

Python programming language : quick and easy recipes

Something I used sometime and thought it should be shared with others. List only files from a directory - ignore all subdirectories import os destdir='/var/tmp/testdir' files = [ f for f in os.listdir(destdir) if os.path.isfile(os.path.join(destdir,f)) ] Print first colums of a file e.g. 3 colums of /proc/diskstats  DISKSTATS_FILE = '/proc/diskstats' diskstats_file = open(DISKSTATS_FILE, 'r') table = [line.rstrip().split() for line in diskstats_file.readlines()] newtable = [[line[0]]+[line[1]]+[line[2]] for line in table] newtable_3coulms = '' for i in newtable:      if i == newtable[0]:       newtable_3coulms = ' '.join(i)     else:       newtable_3coulms = newtable_3coulms +  '\n' + ' '.join(i) print newtable_3coulms diskstats_file.close()
Read more

Creating a package in Python

Make a package root directory $work_dir=/tmp mkdir $work_dir/my_py_pakage touch  $work_dir/my_py_pakage/__init__.py  my_py_pakage is a package; init file that makes the package a python module  If a path is not in sys.path, add it import sys sys.path.append('/tmp') Now you can import your package import mypackage type(mypackage) <class module> dir(mypackage) ['__builtins__',  '__cached__',  '__doc__',  '__file__',  '__loader__',  '__name__',  '__package__',  '__path__',  '__spec__'] See some information for you  module mypackage.__file__ mypackage.__path__ mypackage.__specs__ -packages are a special type of module -unlike normal module, packages can contain other modules and other packages -package has __path__ variable showing path from which package is loaded -sys.path is a list where moduled will be searched -a package is implemented by creating __init__...
Read more

How does yaml data look when converted in python data structure?

You are a python developer and want to know how does yaml data looks when converted to python to understand data in better way, here is some reference PYTHON CODE import yaml from pprint import pprint yaml_data_file = '/home/nansari/data.yaml' read_data = open(yaml_data_file, 'r') python_data = yaml.load(read_data) pprint(python_data, width=8) SAMPLE YAML DATA Add below in file pointing to above yaml_data_file python variable --- filedata:     -          name:              - /home/nansari/puppet_test1              - /home/nansari/puppet_test          owner: daemon          group: pulse          mode: '0644'          ensure: file     -          name:              - ...
Read more