When you merge two indexed dataframes on certain values using 'outer' merge, python/pandas automatically adds Null (NaN) values to the fields it could not match
ownership-semantics
column-major-order
jquery-easing
gear-vr
nscache
glsurfaceview
execfile
appauthhelper
email-headers
tasklet
docblocks
nlohmann-json
angularjs-filter
permission-denied
lazy-sequences
mongodb-biconnector
webmail
sublime-text-plugin
levenshtein-distance
arras
wijmo-grid
prettyfaces
time-and-attendance
libusbdotnet
prompt
bindata
jansson
express-http-proxy
windows-explorer-integration
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