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import sympy
from flask import Flask, render_template, request
import re
from sympy import latex
app = Flask(__name__)
@app.route('/')
def home():
return render_template('index.html')
@app.route('/factorize', methods=['GET'])
def factorize():
expression = request.args.get('expression')
print(expression)
if re.match(r'^[a-zA-Z0-9+\-*/()]+$', expression):
expression = re.sub(r'([A-Za-z])([A-Za-z])', r'\1*\2', expression)
expression = re.sub(r'([0-9])([A-Za-z])', r'\1*\2', expression)
else:
error = "您输入的字符不合规"
return render_template('index.html', error=error)
variables = list(set(expression))
try:
symbols = sympy.symbols(variables)
symbol_dict = dict(zip(variables, symbols))
expr = sympy.sympify(expression, locals=symbol_dict)
factors = sympy.factor(expr)
result = latex(factors)
return render_template('index.html', result=result)
except Exception:
error_message = "*表示乘法，**表示乘方，括号统一使用小括号,数字与字母中间（或字母与字母中间）的乘号可以省略。"
return render_template('index.html', error=error_message)
if __name__ == '__main__':
app.run(host='0.0.0.0', port=5001)
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