如何在 python 中的符号后拆分字符串？

Question

import sympy
equation = input('Enter an equation: ')
a = equation.split(('=') or ('<') or ('>') or ('<=') or ('>=') or ('==') or ('!='))[0:2]
b = sympify(a[0])
c = sympify(a[1])
d = simplify(b - c)
print('This is the equation simplified: ' + str(d))

当出现其中一个符号 (=,<,>,>=,<=,==,,=) 时，我想将方程分成两部分。 但在此代码中，它仅在“=”符号是符号时才有效。

Answer 1

我认为你的代码应该是这样的：

import re        #<--- add this
import sympy


equation = input('Enter an equation: ')
a = re.split(r'[=|<|>|<=|>=|==]', equation)[0:2]   #<--- only change this

b = sympify(a[0])
c = sympify(a[1])
d = simplify(b - c)
print('This is the equation simplified: ' + str(d))