因为每次输入MongoDB的命令都很复杂，老把自己绕迷糊了，所以写了这个小脚本

哪里有不正确，请多多指正。新手求教

class ff(object):    def __init__(self,qq):        self.qq = qq    def __gt__(self,qq):# >        return ff({
   '$gt':{self.qq:qq.qq}})    def __lt__(self,qq):# <        return ff({
   '$lt':{self.qq:qq.qq}})    def __eq__(self,qq):# ==        return ff({
   '$eq':{self.qq:qq.qq}})    def __and__(self,qq):# &        return ff({
   '$and':[self.qq,qq.qq]})    def __or__(self,qq):# |        return ff({
   '$or':[self.qq,qq.qq]})    def __le__(self, qq): # self <= rhs   小于等于                return ff({
   '$lte':{self.qq:qq.qq}})    def __ge__(self, qq):# self >= rhs   大于等于                   return ff({
   '$gte':{self.qq:qq.qq}})    def __ne__(self, qq):  # self != rhs   不等于                   return ff({
   '$ne':{self.qq:qq.qq}})    def __ior__(self, qq):# self |= rhs   即不也不            return ff({
   '$nor':[self.qq,qq.qq]})    def  __invert__(self):# ~self  取反        return ff({
   '$not':self.qq})    # 类方法，将所有变量变成类ff类型的变量，以便于使用运算符重载    @classmethod    def oo(als,a):        i = 0        b = ''        c = ''        while i < len(a):            if a[i] not in "~!&|()><=":                while True:                    if i == len(a)-1:                        c += a[i]                        b += 'ff(' + c + ')'                        i+=1                        break                    elif a[i] in "~!&|()><=":                        if c:                            b += 'ff(' + c + ')'                            c = ''                        break                    c += a[i]                    i += 1            else:                b += a[i]                i+=1        # print(b)     # 查看        return eval(b).qq# a = "'age'>1"# print(ff.oo(a))# a = "('age'!=12)"# print(ff.oo(a))# a = "('age'==12)"# print(ff.oo(a))# a = "('age'>23)|('age'<12)"# print(ff.oo(a))# a = "('age'>12)&('age'<23)"# print(ff.oo(a))# a = "~(('age'>12)&('age'<23))"# print(ff.oo(a))# a = "(('age'>12)&('age'<23))|('score'>90)"# print(ff.oo(a))if __name__ == '__main__':    print("每个运算单独用括号括起来，例如：(('age'>12)&('age'<23))|('score'>90)\n按ctrl + c 结束本程序",)    print()    while True:        a = input("请输入：")        try:            print(ff.oo(a))        except:            print("输入有误，请检查！")复制代码

a = "'age'>1"print(ff.oo(a))		# {'$gt': {'age': 1}}a = "('age'!=12)"print(ff.oo(a))		# {'$ne': {'age': 12}}a = "('age'==12)"print(ff.oo(a))		# {'$eq': {'age': 12}}a = "('age'>23)|('age'<12)"print(ff.oo(a))		# {'$or': [{'$gt': {'age': 23}}, {'$lt': {'age': 12}}]}a = "('age'>12)&('age'<23)"print(ff.oo(a))		# {'$and': [{'$gt': {'age': 12}}, {'$lt': {'age': 23}}]}a = "~(('age'>12)&('age'<23))"print(ff.oo(a))		# {'$not': {'$and': [{'$gt': {'age': 12}}, {'$lt': {'age': 23}}]}}a = "(('age'>12)&('age'<23))|('score'>90)"print(ff.oo(a))		# {'$or': [{'$and': [{'$gt': {'age': 12}}, {'$lt': {'age': 23}}]}, {'$gt':{'score': 90}}]}复制代码

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