Python - Read For Learn

Python: ‘ModuleNotFoundError’ when trying to import module from imported package

FIRST, if you want to be able to access man1.py from man1test.py AND manModules.py from man1.py, you need to properly setup your files as packages and modules. Packages are a way of structuring Python’s module namespace by using “dotted module names”. For example, the module name A.B designates a submodule named B in a package named A. … When importing the package, Python searches through the directories on sys.path looking … Read more

TypeError: ‘NoneType’ object is not iterable in Python

It means the value of data is None.

Web scraping redoc web api

Redoc is a React app which means the actual HTML is being built in runtime: first the skeleton of the page loads, which also loads redoc javascript then the Redoc downloads the OpenAPI json (or yaml) file and renders the actual HTML dynamically based on it This is similar for many apps build with modern JS … Read more

What is the Python equivalent for a case/switch statement? [duplicate]

Python 3.10 and above In Python 3.10, they introduced the pattern matching. Example from the Python Docs: Before Python 3.10 While the official docs are happy not to provide switch, I have seen a solution using dictionaries. For example: Then the equivalent switch block is invoked: This begins to fall apart if you heavily depend on fall through.

How to iterate over rows in a DataFrame in Pandas

DataFrame.iterrows is a generator which yields both the index and row (as a Series):

pandas read_json: “If using all scalar values, you must pass an index”

Try That file only contains key value pairs where values are scalars. You can convert it to a dataframe with ser.to_frame(‘count’). You can also do something like this: Now data is a dictionary. You can pass it to a dataframe constructor like this:

How to iterate over rows in a DataFrame in Pandas

DataFrame.iterrows is a generator which yields both the index and row (as a Series):

Constructing pandas DataFrame from values in variables gives “ValueError: If using all scalar values, you must pass an index”

The error message says that if you’re passing scalar values, you have to pass an index. So you can either not use scalar values for the columns — e.g. use a list: or use scalar values and pass an index:

How can I represent an infinite number in Python?

In Python, you can do: In Python 3.5, you can do: And then: Will always be true. Unless of course, as pointed out, x is also infinity or “nan” (“not a number”). Additionally (Python 2.x ONLY), in a comparison to Ellipsis, float(inf) is lesser, e.g: would return true.

Python exit commands – why so many and when should each be used?

Let me give some information on them: quit() simply raises the SystemExit exception.Furthermore, if you print it, it will give a message:>>> print (quit) Use quit() or Ctrl-Z plus Return to exit >>> This functionality was included to help people who do not know Python. After all, one of the most likely things a newbie will try to … Read more

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