MathP/mathp_eval.py at master · A1bhinavSingh/MathP · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
def mathpevalplus(s):
	a = ""
	sum = 0
	z = ""
	c = 0
	op = ""
	for i in s:
		if(i == "+"):
			sum = sum + int(a)
			a = ""
			op = "+"
		if(i == "-"):
			sum = sum + int(a)
			a = ""
			op = "-"
		else:
			a = a + i
		try:
			z = s[c+1]
		except IndexError:
			if(op == "+"):
				sum = sum + int(a)
			elif(op == "-"):
				sum = sum - int(a)
			else:
				sum = sum + int(a)
		c = c + 1
	return sum
def mathpeval(s):
	if(s.find('*') == -1 and s.find('/') == -1 and s.find('+') == -1 and s.find('-') == -1) and ("(" in s or ")" in s):
		raise SyntaxError
		return False
	return mathpevalbrac(s)
def mathpevalbrac(s):
	st = s
	z = ""
	add = False
	co = 0
	for i in s:
		if(i == "("):
			z = z + i
			co = co + 1
			add = True
		elif(i == ")" and co == 1):
			add = False
			break
		elif(i == ")"):
			z = z + i
			co = co - 1
		elif(add):
			z = z + i
	exe = z
	exe = exe.replace("(","",1)
	z =  z + ")"
	x = exe
	if(exe == "" and "(" in s):
		raise SyntaxError
		return False
	while(str(exe).find("(") != -1):
		exe = mathpeval(exe)
	res = mathpevalmul(exe)
	st = st.replace(z,str(res),1)
	if "(" in exe:
		st = st.replace(z,str(res),1)
		st = mathpeval(st)
	else:
		st = mathpevalmul(st)
		return str(st)

def mathpevalmul(s):
	st = s
	div = []
	mul = []
	c = 0
	for i in st:
		if(i == "*"):
			mul.append(c)
		c = c + 1
	for i in mul:
		k = ""
		indexm = i-1
		while(indexm >= 0 and indexm < len(s)):
			if not (s[indexm].isdigit()):
				break
			k = k + s[indexm]
			indexm = indexm - 1
		k = "".join(reversed(k))
		indexf = i+1
		v = ""
		while(indexf < len(s)):
			if not(s[indexf].isdigit()):
				break
			v = v + s[indexf]
			indexf = indexf + 1
		final = k + "*" + v
		res = str(int(k)*int(v))
		st = st.replace(final,str(res),1)
	while(st.find("*") != -1):
		st = str(mathpeval(st))

	c = 0
	for i in st:
		if(i == "/"):
			div.append(c)
		c = c + 1
	stv = st
	for i in div:
		k = ""
		indexm = i-1
		while(indexm >= 0 and indexm < len(stv)):
			if not (stv[indexm].isdigit()):
				break
			k = k + stv[indexm]
			indexm = indexm - 1
		k = "".join(reversed(k))
		indexf = i+1
		v = ""
		while(indexf < len(stv)):
			if not(stv[indexf].isdigit()):
				break
			v = v + stv[indexf]
			indexf = indexf + 1
		final = k + "/" + v
		if(v == "0"):
			raise ZeroDivisionError
		res = int(k)/int(v)
		res = int(res)
		st = st.replace(final,str(res),1)
	while(st.find("/") != -1):
		st = str(mathpeval(st))
	return mathpevalplus(st)