Understanding .get() method in Python [duplicate]

by

The get method of a dict (like for example characters) works just like indexing the dict, except that, if the key is missing, instead of raising a KeyError it returns the default value (if you call .get with just one argument, the key, the default value is None).

So an equivalent Python function (where calling myget(d, k, v) is just like d.get(k, v) might be:

def myget(d, k, v=None):
  try: return d[k]
  except KeyError: return v

The sample code in your question is clearly trying to count the number of occurrences of each character: if it already has a count for a given character, get returns it (so it’s just incremented by one), else get returns 0 (so the incrementing correctly gives 1 at a character’s first occurrence in the string).

More Related Contents:

  1. How to copy files?
  2. How do I check if a list is empty?
  3. Download large file in python with requests
  4. read subprocess stdout line by line
  5. Unable to allocate array with shape and data type
  6. Python Linked List
  7. Editing the date formatting of x-axis tick labels in matplotlib
  8. When are parentheses required around a tuple?
  9. regex error – nothing to repeat
  10. parsing .properties file in Python
  11. Do I need to import submodules directly?
  12. How can I use numpy.correlate to do autocorrelation?
  13. Meaning of using commas and underscores with Python assignment operator? [duplicate]
  14. Python type hinting without cyclic imports
  15. Use `__dict__` or `vars()`?
  16. Python pytz timezone function returns a timezone that is off by 9 minutes
  17. Getting container/parent object from within python
  18. ImportError: libGL.so.1: cannot open shared object file: No such file or directory
  19. Python: Elegantly merge dictionaries with sum() of values [duplicate]
  20. Why does “[] == False” evaluate to False when “if not []” succeeds?
  21. How do I escape curly-brace ({}) characters in a string while using .format (or an f-string)?
  22. Why am I getting “invalid syntax” from an f-string? [duplicate]
  23. Missing 1 required positional argument
  24. Execute Subprocess in Background
  25. Sieve of Eratosthenes – Primes between X and N
  26. Win32api is not giving the correct coordinates with GetCursorPos() in python
  27. Access Jupyter notebook running on Docker container
  28. ValueError – Cannot assign: must be an instance
  29. A faster alternative to Pandas `isin` function
  30. python setuptools install_requires is ignored when overriding cmdclass

Leave a Comment