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import sympy |
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from flask import Flask, render_template, request |
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import re |
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from sympy import latex |
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app = Flask(__name__) |
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@app.route('/') |
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def home(): |
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return render_template('index.html') |
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@app.route('/factorize', methods=['GET']) |
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def factorize(): |
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expression = request.args.get('expression') |
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print(expression) |
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if re.match(r'^[a-zA-Z0-9+\-*/()]+$', expression): |
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expression = re.sub(r'([A-Za-z])([A-Za-z])', r'\1*\2', expression) |
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expression = re.sub(r'([0-9])([A-Za-z])', r'\1*\2', expression) |
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else: |
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error = "您输入的字符不合规" |
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return render_template('index.html', error=error) |
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variables = list(set(expression)) |
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try: |
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symbols = sympy.symbols(variables) |
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symbol_dict = dict(zip(variables, symbols)) |
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expr = sympy.sympify(expression, locals=symbol_dict) |
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factors = sympy.factor(expr) |
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result = latex(factors) |
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return render_template('index.html', result=result) |
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except Exception: |
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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。" |
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return render_template('index.html', error=error_message) |
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if __name__ == '__main__': |
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app.run(host='0.0.0.0', port=5001) |
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