Dev fix examples

[zdelrosario]

No description provided.

[codecov]

Codecov Report

Merging #177 (a9ac642) into master (9821835) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #177   +/-   ##
=======================================
  Coverage   76.81%   76.81%           
=======================================
  Files          85       85           
  Lines        6482     6483    +1     
=======================================
+ Hits         4979     4980    +1     
  Misses       1503     1503           

Impacted Files	Coverage Δ
grama/comp_building.py	94.96% <ø> (ø)
grama/dataframe.py	95.91% <ø> (ø)
grama/dfply/count.py	100.00% <ø> (ø)
grama/dfply/join.py	92.50% <ø> (ø)
grama/dfply/reshape.py	93.65% <ø> (ø)
grama/dfply/summarize.py	100.00% <ø> (ø)
grama/dfply/summary_functions.py	90.06% <ø> (ø)
grama/dfply/transform.py	100.00% <ø> (ø)
grama/dfply/vector.py	98.50% <ø> (ø)
grama/eval_defaults.py	94.59% <ø> (ø)
... and 20 more

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