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<h1>Installing RDKit on Google Colab</h1>
<p><strong>EDIT:</strong> Try installing RDKit using pip</p>
<pre><code>!pip install rdkit-pypi
</code></pre>
<h2>Old Method (Still Works)</h2>
<p>RDKit is one of the most integral part of any Cheminfomatic specialist's toolkit but it is notoriously difficult to install unless you already have <code>conda</code> installed. I originally found this in a GitHub Gist but I have not been able to find that gist again :/ </p>
<p>Just copy and paste this in a Colab cell and it will install it 👍</p>
<div class="codehilite">
<pre><span></span><code><span class="kn">import</span> <span class="nn">sys</span>
<span class="kn">import</span> <span class="nn">os</span>
<span class="kn">import</span> <span class="nn">requests</span>
<span class="kn">import</span> <span class="nn">subprocess</span>
<span class="kn">import</span> <span class="nn">shutil</span>
<span class="kn">from</span> <span class="nn">logging</span> <span class="kn">import</span> <span class="n">getLogger</span><span class="p">,</span> <span class="n">StreamHandler</span><span class="p">,</span> <span class="n">INFO</span>
<span class="n">logger</span> <span class="o">=</span> <span class="n">getLogger</span><span class="p">(</span><span class="vm">__name__</span><span class="p">)</span>
<span class="n">logger</span><span class="o">.</span><span class="n">addHandler</span><span class="p">(</span><span class="n">StreamHandler</span><span class="p">())</span>
<span class="n">logger</span><span class="o">.</span><span class="n">setLevel</span><span class="p">(</span><span class="n">INFO</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">install</span><span class="p">(</span>
<span class="n">chunk_size</span><span class="o">=</span><span class="mi">4096</span><span class="p">,</span>
<span class="n">file_name</span><span class="o">=</span><span class="s2">"Miniconda3-latest-Linux-x86_64.sh"</span><span class="p">,</span>
<span class="n">url_base</span><span class="o">=</span><span class="s2">"https://repo.continuum.io/miniconda/"</span><span class="p">,</span>
<span class="n">conda_path</span><span class="o">=</span><span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">expanduser</span><span class="p">(</span><span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="s2">"~"</span><span class="p">,</span> <span class="s2">"miniconda"</span><span class="p">)),</span>
<span class="n">rdkit_version</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span>
<span class="n">add_python_path</span><span class="o">=</span><span class="kc">True</span><span class="p">,</span>
<span class="n">force</span><span class="o">=</span><span class="kc">False</span><span class="p">):</span>
<span class="s2">"""install rdkit from miniconda</span>
<span class="s2"> </span>
</code></pre>
</div>
<pre><code>import rdkit_installer
rdkit_installer.install()
```
"""
python_path = os.path.join(
conda_path,
"lib",
"python{0}.{1}".format(*sys.version_info),
"site-packages",
)
if add_python_path and python_path not in sys.path:
logger.info("add {} to PYTHONPATH".format(python_path))
sys.path.append(python_path)
if os.path.isdir(os.path.join(python_path, "rdkit")):
logger.info("rdkit is already installed")
if not force:
return
logger.info("force re-install")
url = url_base + file_name
python_version = "{0}.{1}.{2}".format(*sys.version_info)
logger.info("python version: {}".format(python_version))
if os.path.isdir(conda_path):
logger.warning("remove current miniconda")
shutil.rmtree(conda_path)
elif os.path.isfile(conda_path):
logger.warning("remove {}".format(conda_path))
os.remove(conda_path)
logger.info('fetching installer from {}'.format(url))
res = requests.get(url, stream=True)
res.raise_for_status()
with open(file_name, 'wb') as f:
for chunk in res.iter_content(chunk_size):
f.write(chunk)
logger.info('done')
logger.info('installing miniconda to {}'.format(conda_path))
subprocess.check_call(["bash", file_name, "-b", "-p", conda_path])
logger.info('done')
logger.info("installing rdkit")
subprocess.check_call([
os.path.join(conda_path, "bin", "conda"),
"install",
"--yes",
"-c", "rdkit",
"python=={}".format(python_version),
"rdkit" if rdkit_version is None else "rdkit=={}".format(rdkit_version)])
logger.info("done")
import rdkit
logger.info("rdkit-{} installation finished!".format(rdkit.__version__))
</code></pre>
<p>if <strong>name</strong> == "<strong>main</strong>":
install()
```</p>
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