我有代码:
import re
import math
#from sympy import * # breaks?
#x, y, z = symbols('x y z')
#init_printing(use_unicode=True)
def evaluate_expression(expr, variables):
# Evaluate the expression using eval(), and provide the variables dictionary
return eval(expr, variables)
def main():
tools = """
<<<[eval("5"),a_x]>>>
<<<[eval("5+a_x"),ans]>>>
"""
variables = {}
lines = tools.strip().split("\n")
for line in lines:
# Extract the inner array using regular expression
match = re.search(r'<<<\[(.*?),(\w+)\]>>>', line)
if match:
# Extract expression and variable name
expr = match.group(1)
var_name = match.group(2)
# Evaluate expression
value = evaluate_expression(expr, variables)
# Update variables dictionary
variables[var_name] = value
# Check if 'ans' is defined
if 'ans' in variables:
print("ans =", variables['ans'])
break
if __name__ == "__main__":
main()
如果我不导入 sympy,它运行正常,但如果我导入 sympy,它就会中断,无论我如何命名变量,研究都不再存在。我没听懂?
sympy
有 re
class
,当您导入所有 *
时,您会隐藏 re
导入。首先导入 sympy
或仅导入您实际需要的内容。