四则运算

#python实现自动四则运算2019.11.23
	import random
	import operator
	import argparse
	from fractions import Fraction
	def get_Parameter():#命令行控制模块
	parser = argparse.ArgumentParser()
	parser.add_argument('-n', help='设定题目数量',type=int)
	parser.add_argument('-r', help='设定数值范围',type=int)
	return parser.parse_args()
	class com(object):
	def __init__(self, r):#初始化
	self.r=r
	def get_Arithmeticl(self):#获得随机数字与符号
	symbol=[]
	numerical=[]
	syb=0
	n=1
	m=0
	i=random.randint(1, 3)
	for x in range(i):
	sy=random.choice(['+','-','×','÷'])
	if sy=='+'or sy=='-':
	syb +=10**(i-x-1)
	else :
	syb += 2 * (10 ** (i - x - 1))
	symbol.append(sy)
	if self.r < 10:
	n = int(10 / self.r)
	if n==1:
	while m <= i:
	numerical.append(Fraction(random.randint(1, self.r), random.randint(1, self.r)))
	m+=1
	else:
	while m <= i:
	nu = Fraction(random.randint(1, self.r * n), random.randint(1, self.r * n))
	if nu<=self.r:
	numerical.append(nu)
	m += 1
	return symbol,syb,numerical,i
	def get_Calculate(a,b,c):#四则运算 que:a b == int ?
	if c=='+':
	results=a+b
	elif c=='-':
	results=a-b
	elif c=='×':
	results=a*b
	else:results=a/b
	return results
	def get_Conversion(fraction):#假分数转化真分数
	if fraction.numerator%fraction.denominator==0:
	return '%d'%(fraction.numerator/fraction.denominator)
	elif fraction.numerator>fraction.denominator:
	a=int(fraction.numerator/fraction.denominator)#numerater是分子
	b, c = fraction.numerator - a * fraction.denominator, fraction.denominator
	return '%d%s%d%s%d' % (a,'’',b,'/',c)
	else:
	b, c = fraction.numerator, fraction.denominator
	return '%d%s%d' % (b,'/',c)
	def set_Formula(symbol,numerical,syb):#算术表达式
	s=''
	if syb>100:
	if syb == 112 or syb ==212:
	s = '(%s %s %s %s %s) %s %s = ' % (get_Conversion(numerical[0]), symbol[0],
	get_Conversion(numerical[1]),symbol[1], get_Conversion(numerical[2]), symbol[2], get_Conversion(numerical[3]))
	elif syb == 121 or syb ==122:
	s = '(%s %s %s) %s %s %s %s = ' % (get_Conversion(numerical[0]), symbol[0],
	get_Conversion(numerical[1]),symbol[1], get_Conversion(numerical[2]), symbol[2], get_Conversion(numerical[3]))
	else:
	s = '%s %s %s %s %s %s %s = ' % (get_Conversion(numerical[0]), symbol[0],
	get_Conversion(numerical[1]),symbol[1], get_Conversion(numerical[2]), symbol[2], get_Conversion(numerical[3]))
	elif syb>10:
	if syb == 12:
	s = '(%s %s %s)%s %s = ' % (get_Conversion(numerical[0]), symbol[0],
	get_Conversion(numerical[1]), symbol[1], get_Conversion(numerical[2]))
	else:
	s = '%s %s %s %s %s = ' % (get_Conversion(numerical[0]), symbol[0],
	get_Conversion(numerical[1]), symbol[1], get_Conversion(numerical[2]))
	else :
	s ='%s %s %s = ' % (get_Conversion(numerical[0]),symbol[0],get_Conversion(numerical[1]))
	return s
	def get_Formula(n,r):#生成题目和答案列表
	Exercises,Answers,Exercises1,Exercises2=[],[],[],[]
	x=1
	while x<n+1:
	symbol, syb, numerical,i = com(r).get_Arithmeticl()
	results = numerical[0]
	judge = True
	for y in range(i):
	calculate=get_Calculate(results,numerical[y+1],symbol[y])
	if calculate>=0:#判断算式是否合法
	answer=calculate
	else:
	judge=False
	break
	if judge:#查重
	try:
	num=Answers.index(answer)#第一个重复答案的索引
	if operator.eq(Exercises1[num],symbol) and operator.eq(Exercises2[num],numerical):
	pass
	except ValueError as e:#可以写入
	Answers.append(answer)
	Exercises1.append(symbol)
	Exercises2.append(numerical)
	Exercises.append('%d. %s'%(x,set_Formula(symbol,numerical,syb)))
	x+=1
	else:pass
	return Exercises,Answers
	def text_save(filename, data):#filename为写入文件的路径，data为要写入数据列表.
	file = open(filename,'a')
	file.seek(0)
	file.truncate() # 清空文件
	i = 1
	for x in data:
	x='四则运算题目%i：%s\n'%(i,x)
	file.write(x)
	i +=1
	file.close()
	print('%s文件保存成功'%filename)
	def text__save(filename,data):
	file = open(filename,'a')
	file.seek(0)
	file.truncate() # 清空文件
	i = 1
	for x in data:
	x='答案%s：%s\n'%(i,x)
	file.write(x)
	file.close()
	i+=1
	print('%s文件保存成功'%filename)
	def main():
	args = get_Parameter()
	if args.n:
	n = args.n
	if args.r:
	r = args.r
	Exercises, Answers = get_Formula(n, r)
	for x in range(n):
	Answers[x] = '%d. %s' % (x + 1, get_Conversion(Answers[x]))
	print('本次共生成题目%d道\n题目数值范围为0-%d' % (n, r))
	text_save('Exercises.txt', Exercises)
	text__save('Answers.txt', Answers)
	if __name__ == '__main__':
	main()