DateOffset should have a property for a "normalized" shortcut string

[femtotrader]

Following discussion in pydata/pandas-datareader#257

DateOffset should have a property for a "normalized" shortcut string

So for example we should have

to_offset("7Min").normalized_string == "7T"
to_offset("7MIN").normalized_string == "7T"
to_offset("7min").normalized_string == "7T"

Maybe something like

@property
def normalized_string(self):
     if self.n == 1:
         return self.rule_code
     else:
         return str(self.n) + offset.rule_code

[jorisvandenbossche]

You have the freqstr attribute for this:

In [180]: freq = pd.tseries.frequencies.to_offset("7Min")

In [181]: freq
Out[181]: <7 * Minutes>

In [182]: freq.freqstr
Out[182]: '7T'

[femtotrader]

Thanks
Sorry
So I'm closing