This website uses cookies to collect usage information in order to offer a better browsing experience. By browsing this site or by clicking on the "ACCEPT COOKIES" button you accept our Cookie Policy.

How To Install Python Packages – Part VI

See the previous installment in this series here to learn how to check the version of a Python package.

Things to note

  1. Pip installs the latest version of the package by default.
  2. While installing the specific version pip replaces the existing version if there is any.
  3. You can use the above syntax for installing the packages through IPython notebook.
  4. If you wish to install using command prompt you can use the same syntax by just removing the exclamation mark.

For example,

  • IPython notebook: `!pip install package_name`
  • Command prompt: `pip install package_name`

I hope this will clarify any queries or doubts that you might have about installing Python packages. One of the popular ways to traverse through the Python codes and packages is the dir() function. Let’s learn more about what it does in the next section of the tutorial on ‘how to install Python packages’.

Bonus: dir()function

We can use the built-in function dir() to find which names a module defines. It returns a sorted list of strings.

In []: import arithmetic
In []: dir(arithmetic)
Out[]:
[‘__builtins__’,
‘__cached__’,
‘__doc__’,
‘__file__’,
‘__loader__’,
‘__name__’,
‘__package__’,
‘__spec__’,
‘addition’,
‘division’,
‘factorial’,
‘multiply’]
dir()function | 61

Here, we can see a sorted list of names within the module arithmetic. All other names that begin with an underscore are default Python attributes associated with the module (we did not define them).

Without arguments, dir() lists the names we have defined currently:

In []: a = 1
In []: b = ‘string’
In []: import arithmetic
In []: dir()

Out[]:
[‘__builtins__’,
‘a’,
‘arithmetic’,
‘b’,
‘exit’,
‘Quit’]

Stay tuned for the next installment, in which the authors will discuss how to address queries in Python.

Visit QuantInsti website to download readily available Python commands.

Disclosure: Interactive Brokers

Information posted on IBKR Traders’ Insight that is provided by third-parties and not by Interactive Brokers does NOT constitute a recommendation by Interactive Brokers that you should contract for the services of that third party. Third-party participants who contribute to IBKR Traders’ Insight are independent of Interactive Brokers and Interactive Brokers does not make any representations or warranties concerning the services offered, their past or future performance, or the accuracy of the information provided by the third party. Past performance is no guarantee of future results.

This material is from QuantInsti and is being posted with permission from QuantInsti. The views expressed in this material are solely those of the author and/or QuantInsti and IBKR is not endorsing or recommending any investment or trading discussed in the material. This material is not and should not be construed as an offer to sell or the solicitation of an offer to buy any security. To the extent that this material discusses general market activity, industry or sector trends or other broad based economic or political conditions, it should not be construed as research or investment advice. To the extent that it includes references to specific securities, commodities, currencies, or other instruments, those references do not constitute a recommendation to buy, sell or hold such security. This material does not and is not intended to take into account the particular financial conditions, investment objectives or requirements of individual customers. Before acting on this material, you should consider whether it is suitable for your particular circumstances and, as necessary, seek professional advice.

trading top