otp.Source.head (jupyter)#

Source.head(n=5, **kwargs)#

Executes the query and returns first n ticks as a pandas dataframe.

It is useful in the Jupyter case when you want to observe first n values.

Parameters:

  • n (int, default=5) – number of ticks to return

  • kwargs – parameters will be passed to otp.run

  • self (Source)

Return type:

DataFrame

Examples

>>> data = otp.Ticks(X=list('abcdefgik'))
>>> data.head()
                     Time  X
0 2003-12-01 00:00:00.000  a
1 2003-12-01 00:00:00.001  b
2 2003-12-01 00:00:00.002  c
3 2003-12-01 00:00:00.003  d
4 2003-12-01 00:00:00.004  e

See also

onetick.py.agg.first()
otp.run
onetick.py.Source.tail()
onetick.py.Source.count()