How to jump to a particular line in a huge text file?

by

You can’t jump ahead without reading in the file at least once, since you don’t know where the line breaks are. You could do something like:

# Read in the file once and build a list of line offsets
line_offset = []
offset = 0
for line in file:
    line_offset.append(offset)
    offset += len(line)
file.seek(0)

# Now, to skip to line n (with the first line being line 0), just do
file.seek(line_offset[n])

More Related Contents:

  1. Reading data from txt file only reads last line [closed]
  2. Why does my .find() function keep throwing up an error? [duplicate]
  3. How to determine the encoding of text?
  4. How to get line count of a large file cheaply in Python?
  5. Best way to retrieve variable values from a text file?
  6. Convert tab-delimited txt file into a csv file using Python
  7. Copying from one text file to another using Python
  8. Reading specific columns from a text file in python
  9. How can I check for NaN values?
  10. Python Selenium wait for several elements to load
  11. How to remove stop words using nltk or python
  12. Flatten nested dictionaries, compressing keys
  13. How to pretty-print a numpy.array without scientific notation and with given precision?
  14. Why does using `arg=None` fix Python’s mutable default argument issue?
  15. Create an empty list with certain size in Python
  16. using an numpy array as indices of the 2nd dim of another array? [duplicate]
  17. Run command and get its stdout, stderr separately in near real time like in a terminal
  18. Python – pygame error when executing exe file
  19. Tkinter vanishing PhotoImage issue [duplicate]
  20. How do I make a time delay? [duplicate]
  21. What is the naming convention in Python for variable and function?
  22. A good way to make long strings wrap to newline?
  23. Can an object inspect the name of the variable it’s been assigned to?
  24. How to plot time series in python
  25. how to save a pylab figure into in-memory file which can be read into PIL image?
  26. Check if a geopoint with latitude and longitude is within a shapefile
  27. Convert pandas DataFrame into list of lists [duplicate]
  28. How to redirect from a view to another view In Django
  29. Opening a process with Popen and getting the PID
  30. How to return and download Excel file using FastAPI?

Leave a Comment