用 Python 解方程

用 python解一元一次方程

#!python3
import re

def solve(eq, var='x'):
    eq = re.sub(r'([\d\.]+)([xy])', r'\1*\2', eq)
    try:
        c = eval(eq.replace("=", "-(" ) + ")", {var: 1j})
        x = -c.real/c.imag
    except Exception as err:
        print(err)
        return
    return x

if __name__ == '__main__':
    eq = '2x +10 = 10x'
    print(eq)
    x = solve(eq)
    print('x=%s' % x)