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Presents code examples that use the instaloader module for more advanced tasks than what is possible with the Instaloader command line interface. Presents #46, #56, #110, #113, #120, #121.
106 lines
3.3 KiB
ReStructuredText
106 lines
3.3 KiB
ReStructuredText
.. _codesnippets:
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Advanced Instaloader Examples
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=============================
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.. currentmodule:: instaloader
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.. highlight:: python
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.. contents::
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:backlinks: none
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Here we present code examples that use the :ref:`python-module-instaloader` for
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more advanced tasks than what is possible with the Instaloader command line
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interface.
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.. For each code snippet:
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- title
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- brief description of what it does / motivation / how it works
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- code, or link to code
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- link to discussion issue
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- link used methods
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Download Posts in a specific period
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-----------------------------------
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To collect pictures (and metadata) only from a specific period, you can play
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around with :func:`~itertools.dropwhile` and :func:`~itertools.takewhile` from
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:mod:`itertools` like in this snippet.
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.. literalinclude:: codesnippets/121_since_until.py
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See also :class:`Post`, :meth:`Instaloader.download_post`.
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Discussed in :issue:`121`.
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Likes of a Profile / Ghost Followers
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------------------------------------
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To store inactive followers, i.e. followers that did not like any of your
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pictures, into a file you can use this approach.
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.. literalinclude:: codesnippets/120_ghost_followers.py
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See also :meth:`Profile.get_posts`, :meth:`Post.get_likes`,
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:meth:`Profile.get_followers`, :meth:`Instaloader.load_session_from_file`,
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:meth:`Profile.from_username`.
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Discussed in :issue:`120`.
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Track Deleted Posts
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-------------------
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This script uses Instaloader to obtain a list of currently-online posts, and
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generates the matching filename of each post. It outputs a list of posts which
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are online but not offline (i.e. not yet downloaded) and a list of posts which
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are offline but not online (i.e. deleted in the profile).
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.. literalinclude:: codesnippets/56_track_deleted.py
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See also :func:`load_structure_from_file`, :meth:`Profile.from_username`,
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:meth:`Profile.get_posts`, :class:`Post`.
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Discussed in :issue:`56`.
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Only one Post per User
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----------------------
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To download only the one most recent post from each user, this snippet creates a
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:class:`set` that contains the users of which a post has already been
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downloaded. When iterating the posts, check whether the post's owner already is
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in the set. If so, skip the post. Otherwise, download it and add the user to
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that set.
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.. literalinclude:: codesnippets/113_only_one_per_user.py
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See also :class:`Post`, :meth:`Instaloader.download_post`,
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:attr:`Post.owner_profile`, :class:`Profile`.
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Discussed in :issue:`113`.
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Upgrade Images by local Copies
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------------------------------
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The following script finds local versions of images fetched by Instaloader, in
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order to ugprade the downloaded images by locally-found versions with better
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quality. It uses image hashing to identify similar images.
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`updgrade-instaloader-images.py <https://gist.github.com/pavelkryukov/15f93d19a99428a284a8bcec27e0187b>`__ (external link to GitHub Gist)
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Discussed in :issue:`46`.
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Render Captions to downloaded Images
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------------------------------------
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Instaloader does not modify the downloaded JPEG file. However, one could combine
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it with an imaging library such as Pillow or PIL to render the
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:attr:`Post.caption` on pictures. The following shows an approach.
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.. literalinclude:: codesnippets/110_pil_captions.py
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See also :attr:`Post.caption`, :attr:`Post.url`, :meth:`Post.from_shortcode`,
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:func:`load_structure_from_file`.
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Discussed in :issue:`110`.
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