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I would like to write an argument in an application where the argument that I am calling needs to be referenced on the first iteration/run of the script where the initial_run is set to True. Otherwise this value should be left as false. Now this parameter is configured in a configuration file.
The current code that I written is below. What should be changed in this code to return the True value? Now it only returns the value False.
import sys
# main
param_1= sys.argv[0:] in (True, False)
print 'initial_run=', param_1
711
import argparse parser = argparse. ArgumentParser(description="Parse bool") parser. add_argument("--do-something", default=False, action="store_true", help="Flag to do something") args = parser. parse_args() if args.
The Python Boolean type is one of Python's built-in data types. It's used to represent the truth value of an expression. For example, the expression 1 <= 2 is True , while the expression 0 == 1 is False .
Evaluate Variables and Expressions We can evaluate values and variables using the Python bool() function. This method is used to return or convert a value to a Boolean value i.e., True or False, using the standard truth testing procedure.
In Python, True == 1 and False == 0 , as True and False are type bool , which is a subtype of int . When you use the operator + , it is implicitly adding the integer values of True and False .
Running the script from the command line:
# ./my_script.py true
The boolean can be obtined by doing:
import sys
initial_run = sys.argv[1].lower() == 'true'
This way we are doing a comparison of the first argument lowercased to be 'true', and the comparison will return boolean True if the strings match or boolean False if not.
168
change
param_1 = sys.argv[0:] in (True, False)
to:
param_1 = eval(sys.argv[1])
assert isinstance(param_1, bool), raise TypeError('param should be a bool')
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