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pyScheme.py
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pyScheme.py
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#!/usr/bin/env python
import sys
from environment import Environment
from evaluator import eval
from io_handling import parseInput, formatOutput
from primitive_procedure import primitive_procedure_names, primitive_procedure_objects
def load(filename):
"""Load scheme source file `filename`
"""
# The parameter filename is of the form '"path"'
filename = filename[1:-1]
with open(filename) as file:
input = file.read()
result = []
parseInput(input, 0, result)
for exp in result:
output = eval(exp, the_global_environment)
return output
primitive_procedure_objects.append(['primitive', load])
the_global_environment = Environment(list(primitive_procedure_names) + ['load'], primitive_procedure_objects)
load('"./init.scm"')
if __name__ == "__main__":
if len(sys.argv) == 1:
while True:
expressions = input("Input: ")
result = []
parseInput(expressions, 0, result)
for exp in result:
print(formatOutput(eval(exp, the_global_environment)))
else:
with open(sys.argv[1]) as file:
input = file.read()
result = []
parseInput(input, 0, result)
for exp in result:
print(formatOutput(eval(exp, the_global_environment)))