python - Joining multiple CSV Files -


i have folder multiple csv files. every file consists of date , value column. merge files 1 first column consists of value date (which same each file) , other columns populated values of each single vile i.e. (date, value_file1, value_file2...)

any suggestions on how achieved via simple python script or maybe evan through unix command?

thank help!

i'd recommend using tool csvkit's csvjoin

pip install csvkit $ csvjoin --help usage: csvjoin [-h] [-d delimiter] [-t] [-q quotechar] [-u {0,1,2,3}] [-b]                [-p escapechar] [-z maxfieldsize] [-e encoding] [-s] [-v] [-l]                [--zero] [-c columns] [--outer] [--left] [--right]                [file [file ...]]  execute sql-like join merge csv files on specified column or columns.  positional arguments:   file                  csv files operate on. if 1 specified,                         copied stdout.  optional arguments:   -h, --help            show message , exit   -d delimiter, --delimiter delimiter                         delimiting character of input csv file.   -t, --tabs            specifies input csv file delimited                         tabs. overrides "-d".   -q quotechar, --quotechar quotechar                         character used quote strings in input csv file.   -u {0,1,2,3}, --quoting {0,1,2,3}                         quoting style used in input csv file. 0 = quote                         minimal, 1 = quote all, 2 = quote non-numeric, 3 =                         quote none.   -b, --doublequote     whether or not double quotes doubled in input                         csv file.   -p escapechar, --escapechar escapechar                         character used escape delimiter if --quoting 3                         ("quote none") specified , escape                         quotechar if --doublequote not specified.   -z maxfieldsize, --maxfieldsize maxfieldsize                         maximum length of single field in input csv                         file.   -e encoding, --encoding encoding                         specify encoding input csv file.   -s, --skipinitialspace                         ignore whitespace following delimiter.   -v, --verbose         print detailed tracebacks when errors occur.   -l, --linenumbers     insert column of line numbers @ front of                         output. useful when piping grep or simple                         primary key.   --zero                when interpreting or displaying column numbers, use                         zero-based numbering instead of default 1-based                         numbering.   -c columns, --columns columns                         column name(s) on join. should either                         1 name (or index) or comma-separated list 1                         name (or index) each file, in same order                         files specified. may left                         unspecified, in case 2 files                         joined sequentially without performing matching.   --outer               perform full outer join, rather default                         inner join.   --left                perform left outer join, rather default                         inner join. if more 2 files provided                         executed sequence of left outer joins,                         starting @ left.   --right               perform right outer join, rather default                         inner join. if more 2 files provided                         executed sequence of right outer joins,                         starting @ right.  note join operation requires reading files memory. don't try on large files.

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