10 examples of 'python read last line of file' in Python

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def _GetLine(self):
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  # type: () -> Optional[str]
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  line = self.f.readline()
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  if len(line) == 0:
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    return None
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  if not line.endswith('\n'):
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    self.last_line_hint = True
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  return line

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def read_line(filename):
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    """help function to read a single line from a file. returns none"""
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    try:
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        f = open(filename)
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        line = f.readline().strip()
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        f.close()
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        return line
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    except IOError:
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        return None

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def readline(self, limit=-1):
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    """
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    Public method to read one line from file.
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    @keyparam limit maximum bytes to read or all if limit=-1 (int)
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    @return decoded line read
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    """
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    txt = super(File, self).readline(limit)
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    if self.__encoding is None:
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        return txt
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    else:
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        return codecs.decode(txt, self.__encoding)

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def _read_file_lines(file_):
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    """Read lines of file
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       file_: either path to file or a file (like) object.
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       Return list of lines read or 'None' if file does not exist.
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    """
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    cont_str = _read_file(file_)
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    if cont_str is None:
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        return None
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    return [url_str.rstrip() for url_str in cont_str.splitlines()]

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def readline(self):
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    if self.stack:
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        self.line_number += 1
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        return self.stack.pop()
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    else:
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        line = self.f.readline()
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        if line != "":
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            self.line_number += 1
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        return line

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def first_line(path):
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    f = _open_file(path, READ)
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    line = f.readline()
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    f.close()
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    return line.rstrip('\n')

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def read(self): # Note: no size argument -- read until EOF only!
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    return ''.join(self.readlines())

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def read_input(file):
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    for line in file:
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        yield line.rstrip()

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def delete_last_line(file):
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    """
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    Delete the last line of the file handled by the "file" parameter
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    Adapted from https://stackoverflow.com/a/10289740
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    """
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    # Move the pointer (similar to a cursor in a text editor) to the end of the file
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    file.seek(0, os.SEEK_END)
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    # This code means the following code skips the very last character in the file -
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    # i.e. in the case the last line is null we delete the last line
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    # and the penultimate one
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    pos = file.tell() - 1
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    # Read each character in the file one at a time from the penultimate
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    # character going backwards, searching for a newline character
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    # If we find a new line, exit the search
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    while pos > 0 and file.read(1) != "\n":
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        pos -= 1
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        file.seek(pos, os.SEEK_SET)
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    pos += 1
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    # So long as we're not at the start of the file, delete all the characters ahead
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    # of this position
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    if pos > 0:
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        file.seek(pos, os.SEEK_SET)
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        file.truncate()

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def readlines(self):
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    """Read and return the list of all logical lines remaining in the
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       current file."""
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    lines = []
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    while True:
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        line = self.readline()
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        if line is None:
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            return lines
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        lines.append(line)