Replacing @click.option with @click.argument in Python

Question

I have the following script where I utilize @click.option from the click library in Python. I want to know how to replace it with @click.argument without changing the output.

import sys
import click
import pandas as pd
from sklearn import metrics
@click.command()

@click.option('--filename')
# @click.argument('result.csv', type=click.Path(exists=True))

def main(filename):

    df = pd.read_csv(filename)
    y_test = df["actual"].values
    y_pred = df["predicted"].values

    print('R Squared: ' +  str(metrics.r2_score(y_test, y_pred)))
    
if __name__ == '__main__':
    sys.argv = ['',  '--filename', 'result.csv']
    main()

Your commented out was pretty near. See what I answered and give me feedback if it helped. — hc_dev
– hc_dev, Commented Jun 20, 2024 at 22:56

guolei1998 · Accepted Answer · 2021-06-07 04:32:50Z

1

import sys
import click
import pandas as pd
from sklearn import metrics
@click.command()

# @click.option('--filename')
## @click.argument('result.csv', type=click.Path(exists=True))
@click.argument('filename', type=click.Path(exists=True))
def main(filename):

    df = pd.read_csv(filename)
    y_test = df["actual"].values
    y_pred = df["predicted"].values

    print('R Squared: ' +  str(metrics.r2_score(y_test, y_pred)))
    
if __name__ == '__main__':
    # sys.argv = ['',  '--filename', 'result.csv']
    sys.argv = ['',  'result.csv']
    main()

answered Jun 7, 2021 at 4:32

guolei1998

272 bronze badges

Sign up to request clarification or add additional context in comments.

3 Comments

gunel Over a year ago

I tried the code, it prints out the same output, but with the following error message afterwards : ERROR:root:Internal Python error in the inspect module. AttributeError: 'tuple' object has no attribute 'tb_frame' An exception has occurred, use %tb to see the full traceback. --------------------------------------------------------------------------- During handling of the above exception, another exception occurred: SystemExit: 0

José Rodrigues Over a year ago

Anyone has an answer?

hc_dev Over a year ago

@JoséRodrigues Have a look, also AttributeError answered.

hc_dev · Accepted Answer · 2024-05-02 14:10:24Z

Instead of a named option @click.option('--filename') you can use the argument decorator and specifying:

the parameter-name of your function like here filename and
the type of the parameter, e.g. a file-path that is validated for existence: click.Path(exists=True)

Click Argument for file-paths

You can define File Path Arguments as follows with click:

@click.command()
@click.argument('filename', type=click.Path(exists=True))
def main(filename):
    print(f"{filename=}")
    df = pd.read_csv(filename)

However this means changing your command-line, e.g. by removing the option '--filename' element from the array:

if __name__ == '__main__':
    sys.argv = ['',  'result.csv']
    main()

Attribute Error

The runtime error mentioned in a comment to guolei's answer:

AttributeError: 'tuple' object has no attribute 'tb_frame'

is most likely not related to your presented Python script (incl. click, pandas or scikit-learn). It rather comes from your runtime-environment like IPython or Jupyter Notebook. See AttributeError: 'TypeError' object has no attribute 'tb_frame' bug · Issue #12877 · ipython/ipython.

Collectives™ on Stack Overflow

Replacing @click.option with @click.argument in Python

2 Answers 2

3 Comments

Click Argument for file-paths

Attribute Error

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

3 Comments

Click Argument for file-paths

Attribute Error

Comments

Your Answer

Sign up or log in

Post as a guest

Related