SAX Parser in Python-CodePudding

I am parsing xml files in a folder using Python SAX Parser and writing the output in CSV using pandas, But I am getting only the data from last file in the CSV.

I am new to Python and this is for the first time trying SAX Parsing

File read:

for dirpath, dirs, files in os.walk(fp1): 
          for filename in files:
            print(files)
            fname = os.path.join(dirpath,filename)
            if fname.endswith('.xml'):
              print(fname)
              #for count in files:
            parser.parse(fname)

 def characters(self, content):
        rows = []
        cols = ["ReporterCite","DecisionDate","CaseName","FileNum","CourtLocation","CourtName","CourtAbbrv","Judge","CaseLength","CourtCite","ParallelCite","CitedCount","UCN"]
        #ReporteCite, DecisionDate, CaseName, FileNum, CourtLocation, CourtName, CourtAbbrv, Judge, CaseLength, CourtCite, ParallelCite, CitedCount, UCN             

        rows.append({"ReporterCite":self.rc,
                     "DecisionDate": self.dd,
                     "CaseName": self.can,
                     "FileNum": self.fn,
                     "CourtLocation": self.loc,
                     "CourtName": self.cn,
                     "CourtAbbrv": self.ca,
                     "Judge": self.j,   
                     "CaseLength": self.cl,
                     "CourtCite": self.cc,
                     "ParallelCite": self.pc,
                     "CitedCount": self.cd,
                     "UCN": self.rn})

        #print(rows)
        df = pd.DataFrame(rows, columns=cols)
        df.to_csv(fp2,index=False)

CodePudding user response：

I assume you will always overwrite your previous result. This is a pandas question, not a SAX question. You would like append to the existing csv, right? If this is the case you have to use the mode = ‘a’, like df.to_csv('filename.csv',mode = 'a') More options, see Doc

'w' open for writing, truncating the file first (default)
'x' open for exclusive creation, failing if file already exists
'a' open for writing, appending to the end of file if it exists