I want to write a code to create a new dataframe based on this old dataframe using panda.
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In the image, if the field 'Address Line 1' appear more than once, copy that whole row to the new dataframe.
In the case that the field 'Address Line 1' is blank, or appear only once, do not copy.
Notes: Multiple rows entries that has the same 'Address Line 1' might not be right next to each other.