Question

Write a python parsing script.

INPUT File

CASRegistryNumber>1314-96-1</CASRegistryNumber>
<sy>STRONTIUM MONOSULFIDE[Lewis, R.J., Sr (Ed.). Hawley's Condensed Chemical Dictionary. 12th ed. New York, NY: Van Nostrand Rheinhold Co., 1993, p. 1096] **PEER REVIEWED** </sy>
<sy>STRONTIUM SULPHIDE[Lewis, R.J. Sax's Dangerous Properties of Industrial Materials. 9th ed. Volumes 1-3. New York, NY: Van Nostrand Reinhold, 1996., p. 3024] **PEER REVIEWED** </sy>
<sy>ANGIBID **PEER REVIEWED** </sy>
<DateRevised>Created 19830401 by DS</DateRevised>
<CASRegistryNumber>62-44-2</CASRegistryNumber>
<unii>ER0CTH01H9</unii>
<relt>3001 [ACETAMINOPHEN] (METABOLITE)</relt>
<sy>ACETAMIDE, N-(4-ETHOXYPHENYL)- **PEER REVIEWED** </sy>
<sy>ACETIC ACID, AMIDE, N(4-ETHOXYPHENYL)-[Weast, R.C. (ed.). Handbook of Chemistry and Physics. 60th ed. Boca Raton, Florida: CRC Press Inc., 1979., p. C-84] **PEER REVIEWED** </sy>
<sy>PARA-ACETOPHENETIDE[IARC. Monographs on the Evaluation of the Carcinogenic Risk of Chemicals to Humans. Geneva: World Health Organization, International Agency for Research on Cancer, 1972-PRESENT. (Multivolume work). Available at: http://monographs.iarc.fr/ENG/Classification/index.php, p. V13 141] **PEER REVIEWED** </sy>
<sy>PARA-ACETOPHENETIDIDE[IARC. Monographs on the Evaluation of the Carcinogenic Risk of Chemicals to Humans. Geneva: World Health Organization, International Agency for Research on Cancer, 1972-PRESENT. (Multivolume work). Available at: http://monographs.iarc.fr/ENG/Classification/index.php, p. V13 141] **PEER REVIEWED** </sy>
<sy>ACETOPHENETIDIN **PEER REVIEWED** </sy>
CASRegistryNumber>846533-96-1</CASRegistryNumber>
<sy>Propionaldehyde, 3-(methylthio)-[Lewis, R.J. Sr. (ed) Sax's Dangerous Properties of Industrial Materials. 11th Edition. Wiley-Interscience, Wiley &amp; Sons, Inc. Hoboken, NJ. 2004., p. 3442] **PEER REVIEWED** </sy>
<sy>Propanal, 3-(methylthio)-[Lewis, R.J. Sr. (ed) Sax's Dangerous Properties of Industrial Materials. 11th Edition. Wiley-Interscience, Wiley &amp; Sons, Inc. Hoboken, NJ. 2004., p. 3442] **PEER REVIEWED** </sy>
<sy>Methylmercaptopropionic aldehyde[Lewis, R

The output file will look like this:

The first line of output: 1314-96-1^STRONTIUM MONOSULFIDE^STRONTIUM SULPHIDE^ANGIBID^^
The second line of output: 62-44-2^ACETAMIDE, N-(4-ETHOXYPHENYL)^ACETIC ACID, AMIDE, N(4-ETHOXYPHENYL)^PARA-ACETOPHENETIDE^PARA-ACETOPHENETIDIDE^ACETOPHENETIDIN^^
The third line of the output: 846533-96-1^Propionaldehyde, 3-(methylthio)^Propanal, 3-(methylthio)^Methylmercaptopropionic aldehyde^^

Answer 1

Answer:

This is done by simply opening the file in 'r' mode then using string methods to slice, replace and other methods to obtain our desired output.

CODE:

f = open("Cities.txt",'r')
file_data = f.read().splitlines()
str = ''
list1 =[]
for i in file_data:
    if i.startswith('<CASReg'):
        str = i.split('<CASRegistryNumber>')[1].split('</CASRegistryNumber>')[0]
        str = str + '^'
    elif i.startswith('<sy>'):
        new_str = i.split("**")[0].split('[')[0].split('<sy>')[1]
        str = str + new_str[:-1] + '^'

    list1.append(str)
for i in range(0,len(list1)-1):
    if len(list1[i+1])<len(list1[i]):
        print(list1[i] + "^")
print(list1[-1] + "^")

OUTPUT:

THANK YOU...!!