A simple command line calculator, wrapper around Python

c

#!/usr/bin/env python

#
# A command line calculator
#
# Just a wrapper around Python
#
# Put the expression in single quotes if it contains special shell
# characters.
#
# Examples:
#
#   %  c 2 + 0x23-0b11
#   34    0x22    0b100010
#
#   %  c '2**16 - 2048'
#   63488    0xf800    0b1111100000000000
#

import sys

expression = " ".join(sys.argv[1:])

if expression == '':
    print("usage: c 'expression'", file=sys.stderr)
    sys.exit(1)

from math import *

try:
    result = eval(f"'\t'.join((str({expression}), hex({expression}), bin({expression})))")
except TypeError:
    result = eval(str(expression))
except SyntaxError:
    print(f"c: invalid expression: {expression}", file=sys.stderr)
    sys.exit(1)

print(result)