python - I want to print the occurance count of column3 in front of it as shown below -



python - I want to print the occurance count of column3 in front of it as shown below -

this question has reply here:

how print count of occourance of string in same csv file using python? 4 answers

i have 3 columns separated commas shown below(column1,column2,column3). in below illustration "241682-27638-usd-ocof" not repeating count one, "241942-37190-usd-div" repeated twice count 2 , on.

column1,column2,column3 ,occcurance_count_of_column3 name1,empid1,241682-27638-usd-ciggnt ,1 name2,empid2,241682-27638-usd-ocggint ,1 name3,empid3,241942-37190-usd-ggdiv ,2 name4,empid4,241942-37190-usd-chyof ,1 name5,empid5,241942-37190-usd-eqpl ,1 name6,empid6,241942-37190-usd-int ,1 name7,empid7,242066-15343-usd-cyjof ,3 name8,empid8,242066-15343-usd-cyjof ,3 name9,empid9,242066-15343-usd-cyjof ,3 name10,empid10,241942-37190-usd-ggdiv ,2 name11,empid11,242066-33492-usd-cjhof ,1

i have column1,column2,column3 in csv file. want have occcurance_count_of_column3 next column.i want check whether element in column3 repeats , how many times(occcurance_count). , print count of occurrence in same csv file using python.

you need counter. counter available stdlib's collections module can w/o. need 2 passes on data, , assume you're able slurp file content in list of lists info construction conveniently name table

counts = {} row in table: # utilize `get` method of dict optional `d` argument # set 0 (see ">>> help(dict.get)" if new you) counts[row[2]] = counts.get(row[2],0) + 1 row in table: print formatter(row,counts[row[2]])

python python-2.7 csv count

Comments

Post a Comment

Popular posts from this blog

Delphi change the assembly code of a running process -

Delphi change the assembly code of a running process - i'm trying alter address 00741fa5 has push test.009e721c . alter push test.009e71c8 . procedure callback; asm force $9e71c8 end; procedure tform2.btn1click(sender: tobject); var ppid :dword; pprocess : cardinal; begin getwindowthreadprocessid(findwindow(nil,pchar('test')), @ppid); pprocess := openprocess(process_all_access, false, ppid); injectasm(pprocess, $741fa5, 10, integer(@callback), 0); end; here injectasm function (with error checking) function injectasm(process: longword; injectaddress, injectsize, codeaddress, codesize : integer): pointer; var csize, rsize : integer; replaced : array of byte; jmp : array [0..4] of byte; jmpaddress : integer; nopv : byte; : integer; nbr: ulong_ptr; begin //injectsize must equal or greater 5, because need space our //(far) jmp wwxxyyzz instruction //if there's no space, inject in place of few instructions if injectsize ...
Read more

json - Hibernate and Jackson (java.lang.IllegalStateException: Cannot call sendError() after the response has been committed) -

json - Hibernate and Jackson (java.lang.IllegalStateException: Cannot call sendError() after the response has been committed) - hello have problem hibernate , jackson. have 2 pojos @entity @table(name = "users") public class user implements serializable { static final long serialversionuid = 4235637833262722256l; @id @generatedvalue private int id; @column(name = "creation_date") private date creationdate; @column(name = "first_name") private string firstname; @column(name = "last_name") private string lastname; @version @column(name = "version") private int version; @column(name = "e_mail") private string email; @column(name = "enabled") private boolean enabled; @column(name = "login") private string login; @column(name = "password") private string password; @jsonmanagedreference("role") @onetomany(mappedby = "user", cascade = cascadetype.all,fetch = fetchtyp...
Read more

C++ 11 "class" keyword -

C++ 11 "class" keyword - i've started using c++ 11 little bit more , have few questions on special uses of class keyword. know it's used declare class, there's 2 instances have seen don't understand: method<class t>(); and class class_name *var; why precede typename keyword class in first example, , keyword pointer in sec example? that known elaborated type specifier , necessary when class name "shadowed" or "hidden" , need explicit. class t { }; // love of god don't t t; t t2; if compiler smart, give these warnings: main.cpp:15:5: error: must utilize 'class' tag refer type 't' in scope t t2; ^ class main.cpp:14:7: note: class 't' hidden non-type declaration of 't' here t t; ^ if class not defined, deed forwards declaration. for example: template <typename t> void method() { using type = typename t::value_type; } method...
Read more