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
image-recognition
priority-web-sdk
hibernate-search
clause
resolution
android-listview
python-docx
csound
xcode4.6
nsscroller
function-parameter
remote-debugging
vimpulse
performance-monitor
revoscaler
proto
django-users
mobile-browser
stdlist
virtual-drive
primitive-types
android-paint
microsoft-odata
nutch2
scrolltoindex
mergemap
line-drawing
cakephp-3.8
c++builder-xe7
scala-repl
