Warum zeigt Python 'ValueError: String konnte nicht in Float umgewandelt werden?

Question

Ich habe eine CSV mit Zahlen, die ich in Floats umwandeln möchte.

filename = "filename.csv" 
enclosed_folder = "path/to/Folder" 
full_path = os.path.join(enclosed_folder,filename) 

with open(full_path) as input_data: 
    temp = input_data.readlines() 
    n = len(temp) #int(temp.pop(0)) 
    matrix = [x.split(" ") for x in temp] 
    for i in range(n): 
     for j in range(n): 
      matrix[i][j] = float(matrix[i][j]) 
    input_data.close() 

Wenn ich die Datei in einem beliebigen Texteditor öffnen, es zeigt nicht die \n am Ende jeder Zeile.

Aber das Python-Code ausgeführt wird zeigt die `Valueerror: nicht String umwandeln könnte‚wegen ‚\ n zu schweben‘ am Ende jeder Zeile vorhanden ist.

Traceback (most recent call last): 
    File "hierarchical-clustering.py", line 37, in <module> 
    matrix[i][j] = float(matrix[i][j]) 
ValueError: could not convert string to float: '1,0.058824,0.076923,0.066667,0.055556,0.058824,0.071429,0.052632,0.076923,0.0625,0.0625,0.055556,0.055556,0.05,0.066667,0,0,0.055556,0.0625,0.058824,0.058824,0.047619,0.055556,0.0625,0,0.052632,0.066667,0.055556,0.0625,0.058824,0.041667,0.066667,0.058824,0.071429,0.066667,0.076923,0,0.083333,0.052632,0.071429,0.076923,0,0.0625,0.076923,0.058824,0.076923,0.055556,0,0.0625,0.071429,0.0625,0.0625,0.083333,0,0,0,0.058824,0.0625,0,0.058824,0.0625,0.0625,0.066667,0.0625,0.052632,0.066667,0.076923,0.058824,0.071429,0.066667,0.058824,0.071429,0.058824,0.071429,0.058824,0.071429,0.071429\n' 

Also, wie behebe ich diesen Fehler?

EDIT: verwendete ich strip() sowie rstrip() wie in einigen der Antworten vorgeschlagen Leerzeichen zu entfernen, aber der Fehler geht nicht weg:

Traceback (most recent call last): 
    File "hierarchical-clustering.py", line 37, in <module> 
    matrix[i][j] = float(matrix[i][j].rstrip()) 
ValueError: could not convert string to float: '1,0.058824,0.076923,0.066667,0.055556,0.058824,0.071429,0.052632,0.076923,0.0625,0.0625,0.055556,0.055556,0.05,0.066667,0,0,0.055556,0.0625,0.058824,0.058824,0.047619,0.055556,0.0625,0,0.052632,0.066667,0.055556,0.0625,0.058824,0.041667,0.066667,0.058824,0.071429,0.066667,0.076923,0,0.083333,0.052632,0.071429,0.076923,0,0.0625,0.076923,0.058824,0.076923,0.055556,0,0.0625,0.071429,0.0625,0.0625,0.083333,0,0,0,0.058824,0.0625,0,0.058824,0.0625,0.0625,0.066667,0.0625,0.052632,0.066667,0.076923,0.058824,0.071429,0.066667,0.058824,0.071429,0.058824,0.071429,0.058824,0.071429,0.071429' 

Answer 1

Der Fehler liegt an Ihrer Zeilenanalyse. Sie trennen auf Leerzeichen, nicht Kommas, was nach Ihrem Screenshot geschehen sollte. Der Schlüssel ist der Fehler, der zurückgegeben wird. Es wird versucht, die gesamte Zeile von einem String in einen Float umzuwandeln.

Wechsel:

matrix = [x.split(" ") for x in temp] 

An:

matrix = [x.split(",") for x in temp] 

Answer 2

Sie strip() verwenden können Leerzeichen entfernen die Saite.

matrix[i][j] = float(matrix[i][j].strip()) 

Wenn die Kommas Sie sind beunruhigend, Sie .split(',') mit Komma wünschen konnte und keine Leerzeichen:

matrix = [x.strip().split(",") for x in temp] 

Answer 3

das Newline char entfernen mit rstrip() wie folgt aus:

matrix[i][j] = float(matrix[i][j].rstrip())