247 lines
8.5 KiB
Python
Executable File
247 lines
8.5 KiB
Python
Executable File
#!/usr/bin/env python3
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# Parse Belden catalog techdata datasheets
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from PyPDF2 import PdfReader
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import camelot
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import numpy as np
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from PIL import Image
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import io
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import json
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from util import fprint
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import uuid
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from util import run_cmd
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def parse(filename, output_dir, partnum):
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# Extract table data
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tables = camelot.read_pdf(filename, pages="1-end", flavor='lattice', backend="poppler", split_text=False, line_scale=100, process_background=True, resolution=600, interations=1, layout_kwargs={'detect_vertical': False, 'char_margin': 0.5}, shift_text=['r', 't'])
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#fprint("Total tables extracted:", tables.n)
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n = 0
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pagenum = 0
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reader = PdfReader(filename)
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page = reader.pages[0]
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table_list = {}
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for table in tables:
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table.df.replace('', np.nan, inplace=True)
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table.df.dropna(inplace=True, how="all")
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table.df.dropna(inplace=True, axis="columns", how="all")
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table.df.replace(np.nan, '', inplace=True)
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if not table.df.empty:
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#fprint("\nTable " + str(n))
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# Extract table names
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table_start = table.cells[0][0].lt[1] # Read top-left cell's top-left coordinate
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#fprint(table_start)
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ymin = table_start
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ymax = table_start + 10
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if pagenum != table.page - 1:
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pagenum = table.page - 1
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page = reader.pages[table.page - 1]
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parts = []
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def visitor_body(text, cm, tm, fontDict, fontSize):
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y = tm[5]
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if y > ymin and y < ymax:
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parts.append(text)
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page.extract_text(visitor_text=visitor_body)
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text_body = "".join(parts).strip('\n')
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if len(text_body) == 0:
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text_body = str(n)
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#fprint(text_body)
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table_list[text_body] = table.df
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#table.to_html("table" + str(n) + ".html")
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#fprint(table.df)
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#camelot.plot(table, kind='grid').savefig("test" + str(n) + ".png")
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n=n+1
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#camelot.plot(tables[0], kind='grid').savefig("test.png")
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#tables.export(output_dir + '/techdata.json', f='json')
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# fprint(table_list)
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# Extract Basic details - part name & description, image, etc
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reader = PdfReader(filename)
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page = reader.pages[0]
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count = 0
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skip = False
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for image_file_object in page.images:
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if image_file_object.name == "img0.png" and skip == False:
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#fprint(Image.open(io.BytesIO(image_file_object.data)).mode)
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if Image.open(io.BytesIO(image_file_object.data)).mode == "P":
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skip = True
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continue
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with open(output_dir + "/brand.png", "wb") as fp:
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fp.write(image_file_object.data)
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if Image.open(io.BytesIO(image_file_object.data)).size == (430, 430):
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with open(output_dir + "/part.png", "wb") as fp:
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fp.write(image_file_object.data)
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if skip:
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for image_file_object in page.images:
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if image_file_object.name == "img1.png":
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with open(output_dir + "/brand.png", "wb") as fp:
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fp.write(image_file_object.data)
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count += 1
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# Table parsing and reordring
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tables = dict()
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previous_table = ""
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for table_name in table_list.keys():
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# determine shape: horizontal or vertical
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table = table_list[table_name]
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rows = table.shape[0]
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cols = table.shape[1]
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vertical = None
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if rows > 2 and cols == 2:
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vertical = True
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elif cols == 1:
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vertical = False
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elif rows == 1:
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vertical = True
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elif cols == 2: # and rows <= 2
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# inconsistent
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if table.iloc[0, 0].find(":") == len(table.iloc[0, 0]) - 1: # check if last character is ":" indicating a vertical table
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vertical = True
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else:
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vertical = False
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elif cols > 2: # and rows <= 2
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vertical = False
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elif rows > 2 and cols > 2: # big table
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vertical = False
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else: # 1 column, <= 2 rows
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vertical = False
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# missing name check
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for table_name_2 in table_list.keys():
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if table_name_2.find(table.iloc[-1, 0]) >= 0:
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# Name taken from table directly above - this table does not have a name
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table_list["Specs " + str(len(tables))] = table_list.pop(table_name_2, None) # rename table to arbitrary altername name
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break
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if vertical:
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out = dict()
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for row in table.itertuples(index=False, name=None):
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out[row[0].replace("\n", " ").replace(":", "")] = row[1]
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else: # horizontal
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out = dict()
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for col in table.columns:
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col_data = tuple(table[col])
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out[col_data[0].replace("\n", " ")] = col_data[1:]
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tables[table_name] = out
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# multi-page table check
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if table_name.isdigit() and len(tables) > 1:
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fprint(table_name)
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fprint(previous_table)
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main_key = previous_table
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cont_key = table_name
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fprint(tables)
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if vertical == False:
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main_keys = list(tables[main_key].keys())
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for i, (cont_key, cont_values) in enumerate(tables[cont_key].items()):
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if i < len(main_keys):
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fprint(tables[main_key][main_keys[i]])
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tables[main_key][main_keys[i]] = (tables[main_key][main_keys[i]] + (cont_key,) + cont_values)
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del tables[table_name]
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else:
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for key in tables[cont_key].keys():
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tables[main_key][key] = tables[cont_key][key]
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del tables[table_name]
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previous_table = table_name
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# remove multi-line values that occasionally squeak through
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def replace_newlines_in_dict(d):
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for key, value in d.items():
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if isinstance(value, str):
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# Replace \n with " " if the value is a string
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d[key] = value.replace('\n', ' ')
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elif isinstance(value, dict):
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# Recursively call the function if the value is another dictionary
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replace_newlines_in_dict(value)
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return d
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tables = replace_newlines_in_dict(tables)
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# summary
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output_table = dict()
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output_table["partnum"] = partnum
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id = str(uuid.uuid4())
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output_table["id"] = id
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#output_table["position"] = id
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#output_table["brand"] = brand
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output_table["fullspecs"] = tables
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output_table["searchspecs"] = {"partnum": partnum, **flatten(tables)}
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output_table["searchspecs"]["id"] = id
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print(output_table)
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run_cmd("rm " + output_dir + "/*.json") # not reliable!
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with open(output_dir + "/" + output_table["searchspecs"]["id"] + ".json", 'w') as json_file:
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json.dump(output_table["searchspecs"], json_file)
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return output_table
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def flatten(tables):
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def convert_to_number(s):
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try:
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# First, try converting to an integer.
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return int(s)
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except ValueError:
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# If that fails, try converting to a float.
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try:
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return float(s)
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except ValueError:
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# If it fails again, return the original string.
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return s
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out = dict()
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print("{")
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for table in tables.keys():
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for key in tables[table].keys():
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if len(key) < 64:
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keyname = key
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else:
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keyname = key[0:64]
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fullkeyname = (table + ": " + keyname).replace(".","")
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if type(tables[table][key]) is not tuple:
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out[fullkeyname] = convert_to_number(tables[table][key])
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print("\"" + keyname + "\":", "\"" + str(out[fullkeyname]) + "\",")
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elif len(tables[table][key]) == 1:
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out[fullkeyname] = convert_to_number(tables[table][key][0])
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print("\"" + keyname + "\":", "\"" + str(out[fullkeyname]) + "\",")
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# if the item has at least two commas in it, split it
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if tables[table][key].count(',') >= 2:
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out[fullkeyname] = map(lambda x: x.strip(), tables[table][key].split(","))
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print("\"" + keyname + "\":", "\"" + str(out[fullkeyname]) + "\",")
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print("}")
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return out
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if __name__ == "__main__":
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parse("test2.pdf", "cables/10GXS13", "10GXS13") |