Parse1

text1 = "AAA1/2/2019EDI"
text2 = "AAA1/28/2019EDI"
text3 = "AAA12/8/2019EDI"
text4 = "AAA12/28/2019EDI"

def gn1(text):
    eloc = text.find('EDI')
    if text[eloc - 6] == "/":
        start = eloc - 9
        print(text[start])
        print('if', start)
    else:
        start = eloc - 8
        print(text[start])
        print('else', start)
    if text[start - 1].isdigit():
        start -= 1
        print('secondif', start)
    return text[start:eloc]

def gn(text):
    eloc = text.find('EDI')
    start = text.find('/', eloc !!!backwards)

if gn(text1) == "1/2/2019":
    print("text1 success!")
else:
    print(gn(text1))
if gn(text2) == "1/28/2019":
    print("text2 success!")
else:
    print(gn(text2))
if gn(text3) == "12/8/2019":
    print("text3 success!")
else:
    print(gn(text3))
if gn(text4) == "12/28/2019":
    print("text4 success!")
else:
    print(gn(text4))