blob: 45d155ce464fa44dc579bf94934a298f9f3b369c (
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class Reader:
def __init__(self, filename):
self.filename = filename
self._file = None
self.lineno = 0
self.charno = 0
def __enter__(self):
self._file = open(self.filename, "r")
return self
def __exit__(self, type, value, tb):
self._file.close()
def char(self):
ch = self._file.read(1)
self.charno += 1
if ch == "\n":
self.lineno += 1
self.charno = 0
return ch
def peek(self):
pos = self._file.tell()
ch = self._file.read(1)
self._file.seek(pos)
return ch
if __name__ == "__main__":
with Reader("reader.py") as src:
print(src.peek())
while src.peek() != "":
print(src.char())
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