Python: Kann nicht 'Bytes' konvertieren Objekt implizit

Question

auf str Hier ist mein Code:

class ReviewCategoryClassifier(object): 
     @classmethod 
     def load_data(cls, input_file): 
      job = category_predictor.CategoryPredictor() 
      category_counts = None 
      word_counts = {} 

      with open(input_file) as src: 
       for line in src: 
       category, counts = job.parse_output_line(line) 

     def __init__(self, input_file): 
     """input_file: the output of the CategoryPredictor job.""" 
      category_counts, word_counts = self.load_data(input_file) 

      self.word_given_cat_prob = {} 
      for cat, counts in word_counts.iteritems(): 
       self.word_given_cat_prob[cat] = self.normalize_counts(counts) 

       # filter out categories which have no words 
       seen_categories = set(word_counts) 
       seen_category_counts = dict((cat, count) for cat, count in 
             category_counts.iteritems() \ 
              if cat in seen_categories) 
       self.category_prob= self.normalize_counts(
                 seen_category_counts) 

if __name__ == "__main__": 
    input_file = sys.argv[1] 
    text = sys.argv[2] 
    guesses = ReviewCategoryClassifier(input_file).classify(text) 

btw CategoryPredictor() ist ein mrjob Projekt.

Jedes Mal, wenn ich in

getippt

python predict.py yelp_academic_dataset_review.json 'I like donut'

in der Befehlszeile, hat es einen Fehler, der sagt:

TypeError: Can't convert 'bytes' object to str implicitly

Aber Linie ist eine Zeichenfolge stattdessen ein Byte-Objekt. Was habe ich falsch gemacht?

Hier ist das vollständige Zurückverfolgungs

Traceback (most recent call last): 
File "predict.py", line 116, in <module> 
    guesses = ReviewCategoryClassifier(input_file).classify(text) 
File "predict.py", line 65, in __init__ 
    category_counts, word_counts = self.load_data(input_file) 
File "predict.py", line 44, in load_data 
    category, counts = job.parse_output_line(line) 
File "//anaconda/lib/python3.5/site-packages/mrjob/job.py", line 961, in 
    parse_output_line 
return self.output_protocol().read(line) 
File "//anaconda/lib/python3.5/site-packages/mrjob/protocol.py", line 84, in 
    read 
     raw_key, raw_value = line.split(b'\t', 1) 
TypeError: Can't convert 'bytes' object to str implicitly 

Answer 1

Sie müssen Bytes MRJob.parse_output_line passieren; öffnen input_file mit Binärmodus

with open(input_file, 'rb') as src: 
    for line in src: 
     category, counts = job.parse_output_line(line) 

oder die Linie kodieren, bevor die Methode übergeben:

with open(input_file) as src: 
    for line in src: 
     category, counts = job.parse_output_line(line.encode())