python - Count unique elements from all the rows of a column -


i have data frame df column called "groups". looks below -

groups [u'cn=myusers,ou=groups,dc=sample,dc=com',u'cn=sample-users,ou=groups,dc=sample,dc=com'] [u'cn=myusers,ou=groups,dc=sample,dc=com',u'cn=sample-users,ou=groups,dc=sample,dc=com',u'cn=moreusers,ou=groups,dc=sample,dc=com']

first row contains 2 groups , 2nd row contains 3 groups. want make count of each unique group in whole column. resulting data frame should - 

group                                         count u'cn=myusers,ou=groups,dc=sample,dc=com'       2 u'cn=sample-users,ou=groups,dc=sample,dc=com'  2 u'cn=moreusers,ou=groups,dc=sample,dc=com'     1

how able achieve task. trying- 

res=df.groups.apply(pd.series).stack().value_counts()

but doesn't give me expected result. doesn't break counts of individual groups.

this should work:

from itertools import chain  pd.dataframe(map(lambda x: (x, 1), chain.from_iterable(df.groups.values))).groupby(0, as_index=false).sum().rename(columns={0:'group', 1:'count'})                                          group  count 0     cn=moreusers,ou=groups,dc=sample,dc=com      1 1       cn=myusers,ou=groups,dc=sample,dc=com      2 2  cn=sample-users,ou=groups,dc=sample,dc=com      2

also this:

pd.dataframe(list(chain.from_iterable(df.groups.values)), columns=['group']).group.value_counts()  cn=sample-users,ou=groups,dc=sample,dc=com    2 cn=myusers,ou=groups,dc=sample,dc=com         2 cn=moreusers,ou=groups,dc=sample,dc=com       1

time tests:

%timeit pd.dataframe(list(chain.from_iterable(df.groups.values)), columns=['group']).group.value_counts()  1000 loops, best of 3: 899 µs per loop  %timeit pd.dataframe(list(chain.from_iterable(df.groups.values))).groupby(0, as_index=false).sum().rename(columns={0:'group', 1:'count'})  100 loops, best of 3: 5.5 ms per loop

Comments

Post a Comment

Popular posts from this blog

php - Vagrant up error - Uncaught Reflection Exception: Class DOMDocument does not exist -

i've set bento/ubuntu-16.04 vagrant box using php 5.6, , getting following error quite few times when try , run shell script: "uncaught reflection exception: class domdocument not exist". i've tried adding following top of script (not together), each no success: "sudo apt-get install php5.6-xml", "sudo apt-get install php5-xml", "sudo apt-get install php-dom" i've tried resetting server "sudo service apache2 restart". does have suggestions?
Read more

vue.js - Create hooks for automated testing -

Image
qa guys complained can't automate frontend testing. because our html looks same outside. lazy hack did this <template> <div :role="$options.name"> ... </div> </template> <script> export default { name: 'vmcomponentname' } </script> which takes name script , applies html. in browser get: <div role="vmcomponentname"> ... </div> line :role="$options.name" goes in every component. is there dry er solutions? please share. additional details i'll explain in details looking for. imagine have vmusercreate form creates user. test case can create user . to automatically test without role, have use following selector: .wrapper > .wrapper > .wrapper > .submit-button the test extremely brittle (will break lot). if use roles can use [role="vmusercreateform"] .submit-button selector. many folds less brittle. so basically, i'm ...
Read more

Add new key value to json node in java -

i have json file : { "id":1, "name":"abc", "addressdetails": { "city":"newyork" } } i wanted add 1 more key-value ("pincode" : "414141") node 'addressdetails'. i tried using : objectmapper mapper = new objectmapper(); jsonnode root = mapper.readtree(new file("d://test.json")); objectnode node = mapper.createobjectnode(); node.with("addressdetails").put("pincode", "414141"); but it's not getting added, there way can ? you can try you should modify file path objectmapper mapper = new objectmapper(); objectnode nodes = mapper.readvalue(new file("d:\\test.txt"), objectnode.class); nodes.with("addressdetails").put("pincode", "414141"); mapper.writer().writevalue(new file("d:\\test.txt"), nodes);
Read more