sosokker/Calculator-for-Matrix-and-Algebra
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Check white space in parse_poly()

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This commit is contained in:
Sirin Puenggun 2022-12-11 20:15:54 +07:00
parent a75baf5f2e
commit 28621f2e29
1 changed files with 13 additions and 17 deletions
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30
nessesary/parser/parser.py
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@ -225,6 +225,8 @@ def insert_mul_sign(expr):
try:
if expr[i+1] != ")" and is_op(expr[i+1]):
result += ")*"
else:
result += ")"
except IndexError:
result += char
i += 1
@ -270,14 +272,21 @@ def parse_poly(expr: str) -> list:
Note: Only Specific form of polynomial that
this function can parse.
"""
temp1 = ''
for i in expr:
if i == " ":
temp1 += ""
else:
temp1 += i
expr = temp1
pattern = re.compile('([-+]?\s*\d*\.?\d*)(x?\^?\d?)')
expo_pattern = re.compile('x\^?(\d)?')
coeff_var_list = pattern.findall(expr)
coeff_var_list = pattern.findall(expr)[0:-1]
store = {}
highest_expo = 0
for coeff, var in coeff_var_list:
if not coeff:
coeff = 0
coeff = 1
elif coeff == '-':
coeff = -1
elif coeff == '+':
@ -307,23 +316,10 @@ def parse_poly(expr: str) -> list:
store[var] = temp
else:
store[var][0] += temp[0]
print(store)
result = [0 for i in range(highest_expo+1)]
for item in store.values():
coeff = item[0]
expo = item[1]
result[expo] = coeff
return result
# print(parse_poly("-x^2+2x"))
# print(make_postfix("(2-3+4)*(5+6*7)"))
# print(make_postfix("12sin(x^2)+(4x+12*3)-5"))
# print(insert_mul_sign("12x"))
# print(insert_mul_sign("5x+12y+421abcde+1"))
# print(insert_mul_sign("12((x+12x)x)"))
# print(insert_mul_sign("xsin(x^2)"))
# print(insert_mul_sign("xy+xsin(xy)+12x+y"))
# print(insert_mul_sign("5(1+2*3^12)(12-5(4^2)) + (1-3*4)12"))
# print(insert_mul_sign("(1+2)(3+4)"))
# print(add_exp_sign("x^2^3"))
# print(parse_poly("x^4+1+12x^3-3x^2+5"))
return result