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"""A payload based version of page."""
# Copyright (c) IPython Development Team.
# Distributed under the terms of the Modified BSD License.
import warnings
from IPython.core.getipython import get_ipython
# see https://github.com/ipython/ipykernel/issues/1304
# this should be moved to ipykernel and removed in the long run.
def page(strng, start=0, screen_lines=0, pager_cmd=None):
"""Print a string, piping through a pager.
This version ignores the screen_lines and pager_cmd arguments and uses
IPython's payload system instead.
Parameters
----------
strng : str or mime-dict
Text to page, or a mime-type keyed dict of already formatted data.
start : int
Starting line at which to place the display.
"""
# Some routines may auto-compute start offsets incorrectly and pass a
# negative value. Offset to 0 for robustness.
start = max(0, start)
shell = get_ipython()
if isinstance(strng, dict):
data = strng
else:
data = {"text/plain": strng}
payload = dict(
source="page",
data=data,
start=start,
)
shell.payload_manager.write_payload(payload)
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