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-rw-r--r--src/ee/kicad/__init__.py7
1 files changed, 5 insertions, 2 deletions
diff --git a/src/ee/kicad/__init__.py b/src/ee/kicad/__init__.py
index 1261cb5..d89c209 100644
--- a/src/ee/kicad/__init__.py
+++ b/src/ee/kicad/__init__.py
@@ -20,6 +20,7 @@ __all__ = [
def to_pandas(obj: Any, **kwarg):
import pandas
+ import numpy as np
def run_filter(filters, obj):
for f in filters:
@@ -63,9 +64,11 @@ def to_pandas(obj: Any, **kwarg):
columns = set([key for row in data for key in list(row)]) - set(special_fields)
columns = special_fields + list(columns)
- return pandas.DataFrame(data=data, columns=columns). \
+ df = pandas.DataFrame(data=data, columns=columns). \
set_index("ref"). \
- sort_values(["ref_type", "ref_num"])
+ sort_values(["ref_type", "ref_num"]). \
+ applymap(lambda s: s if isinstance(s, str) else None)
+ return df
if isinstance(obj, Schematic):
return to_pandas_schematic(obj)