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
1 class ff(object): 2 def __init__(self,qq): 3 self.qq = qq 4 def __gt__(self,qq):# > 5 return ff({'$gt':{self.qq:qq.qq}}) 6 7 def __lt__(self,qq):# < 8 return ff({'$lt':{self.qq:qq.qq}}) 9 10 def __eq__(self,qq):# == 11 return ff({'$eq':{self.qq:qq.qq}}) 12 13 def __and__(self,qq):# & 14 return ff({'$and':[self.qq,qq.qq]}) 15 16 def __or__(self,qq):# | 17 return ff({'$or':[self.qq,qq.qq]}) 18 19 def __le__(self, qq): # self <= rhs 小于等于 20 21 return ff({'$lte':{self.qq:qq.qq}}) 22 23 def __ge__(self, qq):# self >= rhs 大于等于 24 25 return ff({'$gte':{self.qq:qq.qq}}) 26 27 def __ne__(self, qq): # self != rhs 不等于 28 29 return ff({'$ne':{self.qq:qq.qq}}) 30 31 def __ior__(self, qq):# self |= rhs 即不也不 32 33 return ff({'$nor':[self.qq,qq.qq]}) 34 35 def __invert__(self):# ~self 取反 36 return ff({'$not':self.qq}) 37 38 # 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 39 @classmethod 40 def oo(als,a): 41 i = 0 42 b = '' 43 c = '' 44 while i < len(a): 45 if a[i] not in "~!&|()><=": 46 while True: 47 if i == len(a)-1: 48 c += a[i] 49 b += 'ff(' + c + ')' 50 i+=1 51 break 52 elif a[i] in "~!&|()><=": 53 if c: 54 b += 'ff(' + c + ')' 55 c = '' 56 break 57 c += a[i] 58 i += 1 59 else: 60 b += a[i] 61 i+=1 62 63 # print(b) # 查看 64 return eval(b).qq 65 66 # a = "'age'>1" 67 # print(ff.oo(a)) 68 # a = "('age'!=12)" 69 # print(ff.oo(a)) 70 # a = "('age'==12)" 71 # print(ff.oo(a)) 72 # a = "('age'>23)|('age'<12)" 73 # print(ff.oo(a)) 74 # a = "('age'>12)&('age'<23)" 75 # print(ff.oo(a)) 76 # a = "~(('age'>12)&('age'<23))" 77 # print(ff.oo(a)) 78 # a = "(('age'>12)&('age'<23))|('score'>90)" 79 # print(ff.oo(a))
80 if __name__ == '__main__': 81 print("每个运算单独用括号括起来，例如：(('age'>12)&('age'<23))|('score'>90) 按ctrl + c 结束本程序",) 82 print() 83 while True: 84 a = input("请输入：") 85 try: 86 print(ff.oo(a)) 87 except: 88 print("输入有误，请检查！")
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)) # {'$gt': {'age': 1}} # {'$ne': {'age': 12}} # {'$eq': {'age': 12}} # {'$or': [{'$gt': {'age': 23}}, {'$lt': {'age': 12}}]} # {'$and': [{'$gt': {'age': 12}}, {'$lt': {'age': 23}}]} # {'$not': {'$and': [{'$gt': {'age': 12}}, {'$lt': {'age': 23}}]}} # {'$or': [{'$and': [{'$gt': {'age': 12}}, {'$lt': {'age': 23}}]}, {'$gt':{'score': 90}}]}
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