import numpy as np
import pyspedas
[docs]
def data_exists(tvar):
"""
Checks if a tplot variable exists
Parameters
----------
tvar: str
Name of tplot variable to check
Returns
--------
bool
Retrun True if tplot variable exists.
Example
----------
>>> import pyspedas
>>> pyspedas.store_data('a', data={'x': range(10), 'y': range(10)})
>>> pyspedas.data_exists('a')
"""
if tvar in pyspedas.tplot_tools.data_quants.keys():
data = pyspedas.get_data(tvar, dt=True)
# multi-dimensional data returns a tuple, NRV variables return an ndarray
if isinstance(data, tuple) or isinstance(data, np.ndarray) or isinstance(data, str) or isinstance(data, list):
return True
return False