ModuleNotFoundError: No module named 'cassandra'

user_10060068 0
Viewed 7715

After installing cassandra driver by running the command: sudo pip3 install cassandra-driver, I am getting the error ModuleNotFoundError: No module named 'cassandra' when I try to import the module by running the line cassandra.

I then tried to see what all modules are installed in pip3 by running the command pip3 freeze:

astroid==2.1.0
cassandra-driver==3.16.0
isort==4.3.4
lazy-object-proxy==1.3.1
mccabe==0.6.1
pylint==2.2.2
six==1.12.0
wrapt==1.10.11

Seeing no cassandra, I tried to import the visible module: cassandra-driver and then I ended up with the error:

File "<stdin>", line 1
    import cassandra-driver
                    ^
SyntaxError: invalid syntax

Also, when I do correct the hyphen issue with this: __import__("cassandra-driver"), I get the error:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ModuleNotFoundError: No module named 'cassandra-driver'

My which python3 is: /usr/local/bin/python3 and my which pip3 is: /usr/local/bin/pip3

My OS is MacOS

How to install cassandra? Note: I am following this documentation.

pip cassandra python-3.x
2 Answers

Did you try to run these demos (from those docs)?

"If successful, you should be able to build and install the extension (just using setup.py build or setup.py install) and then use the libev event loop by doing the following:"

>>> from cassandra.io.libevreactor import LibevConnection
>>> from cassandra.cluster import Cluster

>>> cluster = Cluster()
>>> cluster.connection_class = LibevConnection
>>> session = cluster.connect()

There is a probability that actual module is named differently, e.g. there is another external package called Pillow, but you import it with name "PIL". In docs they are importing from cassandra.cluster

Docs I'm referring to

user_97157130 
$ echo 'import cassandra.cluster' > cassandra.py && python3 cassandra.py
Traceback (most recent call last):
  File "./cassandra.py", line 3, in <module>
    import cassandra
  File "/home/xxx/cassandra.py", line 4, in <module>
    import cassandra.cluster
ModuleNotFoundError: No module named 'cassandra.cluster'; 'cassandra' is not a package

Using a different filename, the error disappears:

echo 'import cassandra.cluster' > tmp.py && python3 cassandra.py

So, for me, the error was that my own program overrode the package. O.o

user_93425220
Related