You can make a filter-function.
Instead of jumping directly into pandas, you should know also the Python stuff.
The else-block of the for-loop is only then executed, if the for-loop has finished the iteration.
Breaking early out of the loop, will not execute the else-block of the for-loop.
This means only if all keys are existing and return the wanted values, it will yield a hit.
The use of
Otherwise you'll get a
The
You can define the default values as second argument in the get method.
The function itself return a generator, if called. The generator does nothing until
it's consumed by a for-loop or types like tuple, list, set, etc...
If you see in a function a yield statement, then it's a generator.
Generators can do funny stuff, like generating infinite sequences.
Instead of jumping directly into pandas, you should know also the Python stuff.
def filter_by(data, **kwargs): for row in data: for key, value in kwargs.items(): if row.get(key) != value: break else: yield row # if the results are saved in the list result list(filter_by(result, Pos='4'))In this example I do not type conversion. It's just a string comparison of equality.
The else-block of the for-loop is only then executed, if the for-loop has finished the iteration.
Breaking early out of the loop, will not execute the else-block of the for-loop.
This means only if all keys are existing and return the wanted values, it will yield a hit.
The use of
dict.get()
is mandatory, if you don't check if the wanted key exist.Otherwise you'll get a
KeyError
.The
get
method on a dict
, return by default None
, if the key does not exist.You can define the default values as second argument in the get method.
The function itself return a generator, if called. The generator does nothing until
it's consumed by a for-loop or types like tuple, list, set, etc...
If you see in a function a yield statement, then it's a generator.
Generators can do funny stuff, like generating infinite sequences.
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All humans together. We don't need politicians!
All humans together. We don't need politicians!