Das deutsche Python-Forum

Code: Alles auswählen

#!/usr/bin/python
# -*- coding: utf-8 -*-

import time
import numpy as np
import csv
import os

desktopFile = os.path.expanduser("~\Desktop")
path_grund = desktopFile+'\Handy-Datenbank'
path_folder = path_grund+'\\Beispiel.001'

filesize = os.stat(path_folder).st_size
print filesize

f = open(path_folder, 'rb')
def count(f):
    while 1:
        block = f.read(filesize)
        if not block:
             break
        yield block.split(";")

linecount = count(f)
print next(linecount)

Code: Alles auswählen

Message	File Name	Line	Position	
Traceback				
    <module>	C:\Users\DMD-OL\Desktop\Handy-Datenbank\Einlesen.py	25		
    count	C:\Users\DMD-OL\Desktop\Handy-Datenbank\Einlesen.py	19		
exceptions.MemoryError				

Code: Alles auswählen

#!/usr/bin/python
# -*- coding: utf-8 -*-
import os

def count(f):
    block = f.read()
    return block.split(";")

database_filename = os.path.expanduser("~/Desktop/Handy-Datenbank/Beispiel.001")
with open(database_filename, 'rb') as f:
    linecount = count(f)
    print linecount

Code: Alles auswählen

def read_chunks(f, size):
    while True:
        chunk = f.read(size)
        if not chunk:
            return
        yield chunk

# oder alternativ:
def read_chunks(f, size):
    return iter(lambda: f.read(size), '')