Backlash error. Pandas filter dataframe using dynamic query string.

Question

Hi all, The problem is related to the Python backlash error. I am creating a dynamic query string for filtering in pandas. The code is:

Answer 1

The reason is that you are wrapping your key in python format string ( "'{}'".format ) as well. Try this solution:

query_string = ""
index = 0
for (k,v) in filters.iteritems():
  for i in v:
    if (index == 0):
      query_string += str(k) + " == " + "'{}'".format(i)
    else:
      query_string += " & " + str(k) + " == " + "'{}'".format(i)
  index += 1