Replace tool examples with use case examples drawn from the tools.
Signed-off-by: Kent Gibson <warthog618@xxxxxxxxx>
---
bindings/python/examples/Makefile.am | 18 +++----
bindings/python/examples/find_line_by_name.py | 37 +++++++++++++++
bindings/python/examples/get_chip_info.py | 20 ++++++++
bindings/python/examples/get_line_info.py | 29 ++++++++++++
.../examples/get_multiple_line_values.py | 29 ++++++++++++
bindings/python/examples/gpiodetect.py | 15 ------
bindings/python/examples/gpiofind.py | 20 --------
bindings/python/examples/gpioget.py | 29 ------------
bindings/python/examples/gpioinfo.py | 28 -----------
bindings/python/examples/gpiomon.py | 26 ----------
bindings/python/examples/gpionotify.py | 21 ---------
bindings/python/examples/gpioset.py | 36 --------------
bindings/python/examples/helpers.py | 15 ------
.../examples/reconfigure_input_to_output.py | 39 +++++++++++++++
.../examples/toggle_multiple_line_values.py | 47 +++++++++++++++++++
bindings/python/examples/watch_line_info.py | 23 +++++++++
bindings/python/examples/watch_line_rising.py | 31 ++++++++++++
.../examples/watch_multiple_line_values.py | 42 +++++++++++++++++
18 files changed, 307 insertions(+), 198 deletions(-)
create mode 100755 bindings/python/examples/find_line_by_name.py
create mode 100755 bindings/python/examples/get_chip_info.py
create mode 100755 bindings/python/examples/get_line_info.py
create mode 100755 bindings/python/examples/get_multiple_line_values.py
delete mode 100755 bindings/python/examples/gpiodetect.py
delete mode 100755 bindings/python/examples/gpiofind.py
delete mode 100755 bindings/python/examples/gpioget.py
delete mode 100755 bindings/python/examples/gpioinfo.py
delete mode 100755 bindings/python/examples/gpiomon.py
delete mode 100755 bindings/python/examples/gpionotify.py
delete mode 100755 bindings/python/examples/gpioset.py
delete mode 100644 bindings/python/examples/helpers.py
create mode 100755 bindings/python/examples/reconfigure_input_to_output.py
create mode 100755 bindings/python/examples/toggle_multiple_line_values.py
create mode 100755 bindings/python/examples/watch_line_info.py
create mode 100755 bindings/python/examples/watch_line_rising.py
create mode 100755 bindings/python/examples/watch_multiple_line_values.py
diff --git a/bindings/python/examples/Makefile.am b/bindings/python/examples/Makefile.am
index c8c1c98..52abafc 100644
--- a/bindings/python/examples/Makefile.am
+++ b/bindings/python/examples/Makefile.am
@@ -3,13 +3,15 @@
EXTRA_DIST = \
async_watch_line_value.py \
+ find_line_by_name.py \
+ get_chip_info.py \
+ get_line_info.py \
get_line_value.py \
- gpiodetect.py \
- gpiofind.py \
- gpioget.py \
- gpioinfo.py \
- gpiomon.py \
- gpionotify.py \
- gpioset.py \
+ get_multiple_line_values.py \
+ reconfigure_input_to_output.py \
toggle_line_value.py \
- watch_line_value.py
+ toggle_multiple_line_values.py \
+ watch_line_requests.py \
+ watch_line_value.py \
+ watch_line_rising.py \
+ watch_multiple_line_values.py
diff --git a/bindings/python/examples/find_line_by_name.py b/bindings/python/examples/find_line_by_name.py
new file mode 100755
index 0000000..ac798a9
--- /dev/null
+++ b/bindings/python/examples/find_line_by_name.py
@@ -0,0 +1,37 @@
+#!/usr/bin/env python3
+# SPDX-License-Identifier: GPL-2.0-or-later
+# SPDX-FileCopyrightText: 2023 Kent Gibson <warthog618@xxxxxxxxx>
+
+"""Minimal example of finding a line with the given name."""
+
+import gpiod
+import os
+
+
+def generate_gpio_chips():
+ for entry in os.scandir("/dev/"):
+ if gpiod.is_gpiochip_device(entry.path):
+ yield entry.path
+
+
+def find_line_by_name(line_name):
+ # Names are not guaranteed unique, so this finds the first line with
+ # the given name.
+ for path in generate_gpio_chips():
+ with gpiod.Chip(path) as chip:
+ try:
+ offset = chip.line_offset_from_id(line_name)
+ print("{}: {} {}".format(line_name, chip.get_info().name, offset))
+ return
+ except OSError:
+ # An OSError is raised if the name is not found.
+ continue
+
+ print("line '{}' not found".format(line_name))
+
+
+if __name__ == "__main__":
+ try:
+ find_line_by_name("GPIO19")
+ except OSError as ex:
+ print(ex, "\nCustomise the example configuration to suit your situation")
diff --git a/bindings/python/examples/get_chip_info.py b/bindings/python/examples/get_chip_info.py
new file mode 100755
index 0000000..7dc76fb
--- /dev/null
+++ b/bindings/python/examples/get_chip_info.py
@@ -0,0 +1,20 @@
+#!/usr/bin/env python3
+# SPDX-License-Identifier: GPL-2.0-or-later
+# SPDX-FileCopyrightText: 2023 Kent Gibson <warthog618@xxxxxxxxx>
+
+"""Minimal example of reading the info for a chip."""
+
+import gpiod
+
+
+def get_chip_info(chip_path):
+ with gpiod.Chip(chip_path) as chip:
+ info = chip.get_info()
+ print("{} [{}] ({} lines)".format(info.name, info.label, info.num_lines))
+
+
+if __name__ == "__main__":
+ try:
+ get_chip_info("/dev/gpiochip0")
+ except OSError as ex:
+ print(ex, "\nCustomise the example configuration to suit your situation")
diff --git a/bindings/python/examples/get_line_info.py b/bindings/python/examples/get_line_info.py
new file mode 100755
index 0000000..cd4ebcc
--- /dev/null
+++ b/bindings/python/examples/get_line_info.py
@@ -0,0 +1,29 @@
+#!/usr/bin/env python3
+# SPDX-License-Identifier: GPL-2.0-or-later
+# SPDX-FileCopyrightText: 2023 Kent Gibson <warthog618@xxxxxxxxx>
+
+"""Minimal example of reading the info for a line."""
+
+import gpiod
+
+
+def get_line_info(chip_path, line_offset):
+ with gpiod.Chip(chip_path) as chip:
+ info = chip.get_line_info(line_offset)
+ is_input = info.direction == gpiod.line.Direction.INPUT
+ print(
+ "line {:>3}: {:>12} {:>12} {:>8} {:>10}".format(
+ info.offset,
+ info.name or "unnamed",
+ info.consumer or "unused",
+ "input" if is_input else "output",
+ "active-low" if info.active_low else "active-high",
+ )
+ )
+
+
+if __name__ == "__main__":
+ try:
+ get_line_info("/dev/gpiochip0", 3)
+ except OSError as ex:
+ print(ex, "\nCustomise the example configuration to suit your situation")
diff --git a/bindings/python/examples/get_multiple_line_values.py b/bindings/python/examples/get_multiple_line_values.py
new file mode 100755
index 0000000..46cf0b2
--- /dev/null
+++ b/bindings/python/examples/get_multiple_line_values.py
@@ -0,0 +1,29 @@
+#!/usr/bin/env python3
+# SPDX-License-Identifier: GPL-2.0-or-later
+# SPDX-FileCopyrightText: 2023 Kent Gibson <warthog618@xxxxxxxxx>
+
+"""Minimal example of reading multiple lines."""
+
+import gpiod
+
+from gpiod.line import Direction
+
+
+def get_multiple_line_values(chip_path, line_offsets):
+ with gpiod.request_lines(
+ chip_path,
+ consumer="get-multiple-line-values",
+ config={tuple(line_offsets): gpiod.LineSettings(direction=Direction.INPUT)},
+ ) as request:
+ vals = request.get_values()
+
+ for offset, val in zip(line_offsets, vals):
+ print("{}={} ".format(offset, val), end="")
+ print()
+
+
+if __name__ == "__main__":
+ try:
+ get_multiple_line_values("/dev/gpiochip0", [5, 3, 7])
+ except OSError as ex:
+ print(ex, "\nCustomise the example configuration to suit your situation")
diff --git a/bindings/python/examples/gpiodetect.py b/bindings/python/examples/gpiodetect.py
deleted file mode 100755
index dc98b03..0000000
--- a/bindings/python/examples/gpiodetect.py
+++ /dev/null
@@ -1,15 +0,0 @@
-#!/usr/bin/env python3
-# SPDX-License-Identifier: GPL-2.0-or-later
-# SPDX-FileCopyrightText: 2022 Bartosz Golaszewski <brgl@xxxxxxxx>
-
-"""Reimplementation of the gpiodetect tool in Python."""
-
-import gpiod
-import os
-
-from helpers import gpio_chips
-
-if __name__ == "__main__":
- for chip in gpio_chips():
- info = chip.get_info()
- print("{} [{}] ({} lines)".format(info.name, info.label, info.num_lines))
diff --git a/bindings/python/examples/gpiofind.py b/bindings/python/examples/gpiofind.py
deleted file mode 100755
index d41660d..0000000
--- a/bindings/python/examples/gpiofind.py
+++ /dev/null
@@ -1,20 +0,0 @@
-#!/usr/bin/env python3
-# SPDX-License-Identifier: GPL-2.0-or-later
-# SPDX-FileCopyrightText: 2022 Bartosz Golaszewski <brgl@xxxxxxxx>
-
-"""Reimplementation of the gpiofind tool in Python."""
-
-import gpiod
-import os
-import sys
-
-if __name__ == "__main__":
- for entry in os.scandir("/dev/"):
- if gpiod.is_gpiochip_device(entry.path):
- with gpiod.Chip(entry.path) as chip:
- offset = chip.line_offset_from_id(sys.argv[1])
- if offset is not None:
- print("{} {}".format(chip.get_info().name, offset))
- sys.exit(0)
-
- sys.exit(1)
diff --git a/bindings/python/examples/gpioget.py b/bindings/python/examples/gpioget.py
deleted file mode 100755
index bf7e0a6..0000000
--- a/bindings/python/examples/gpioget.py
+++ /dev/null
@@ -1,29 +0,0 @@
-#!/usr/bin/env python3
-# SPDX-License-Identifier: GPL-2.0-or-later
-# SPDX-FileCopyrightText: 2022 Bartosz Golaszewski <brgl@xxxxxxxx>
-
-"""Simplified reimplementation of the gpioget tool in Python."""
-
-import gpiod
-import sys
-
-from gpiod.line import Direction
-
-if __name__ == "__main__":
- if len(sys.argv) < 3:
- raise TypeError("usage: gpioget.py <gpiochip> <offset1> <offset2> ...")
-
- path = sys.argv[1]
- lines = [int(line) if line.isdigit() else line for line in sys.argv[2:]]
-
- request = gpiod.request_lines(
- path,
- consumer="gpioget.py",
- config={tuple(lines): gpiod.LineSettings(direction=Direction.INPUT)},
- )
-
- vals = request.get_values()
-
- for val in vals:
- print("{} ".format(val.value), end="")
- print()
diff --git a/bindings/python/examples/gpioinfo.py b/bindings/python/examples/gpioinfo.py
deleted file mode 100755
index 3996dcf..0000000
--- a/bindings/python/examples/gpioinfo.py
+++ /dev/null
@@ -1,28 +0,0 @@
-#!/usr/bin/env python3
-# SPDX-License-Identifier: GPL-2.0-or-later
-# SPDX-FileCopyrightText: 2022 Bartosz Golaszewski <brgl@xxxxxxxx>
-
-"""Simplified reimplementation of the gpioinfo tool in Python."""
-
-import gpiod
-import os
-
-from helpers import gpio_chips
-
-if __name__ == "__main__":
- for chip in gpio_chips():
- cinfo = chip.get_info()
- print("{} - {} lines:".format(cinfo.name, cinfo.num_lines))
-
- for offset in range(0, cinfo.num_lines):
- linfo = chip.get_line_info(offset)
- is_input = linfo.direction == gpiod.line.Direction.INPUT
- print(
- "\tline {:>3}: {:>18} {:>12} {:>8} {:>10}".format(
- linfo.offset,
- linfo.name or "unnamed",
- linfo.consumer or "unused",
- "input" if is_input else "output",
- "active-low" if linfo.active_low else "active-high",
- )
- )
diff --git a/bindings/python/examples/gpiomon.py b/bindings/python/examples/gpiomon.py
deleted file mode 100755
index 702d7c8..0000000
--- a/bindings/python/examples/gpiomon.py
+++ /dev/null
@@ -1,26 +0,0 @@
-#!/usr/bin/env python3
-# SPDX-License-Identifier: GPL-2.0-or-later
-# SPDX-FileCopyrightText: 2022 Bartosz Golaszewski <brgl@xxxxxxxx>
-
-"""Simplified reimplementation of the gpiomon tool in Python."""
-
-import gpiod
-import sys
-
-from gpiod.line import Edge
-
-if __name__ == "__main__":
- if len(sys.argv) < 3:
- raise TypeError("usage: gpiomon.py <gpiochip> <offset1> <offset2> ...")
-
- path = sys.argv[1]
- lines = [int(line) if line.isdigit() else line for line in sys.argv[2:]]
-
- with gpiod.request_lines(
- path,
- consumer="gpiomon.py",
- config={tuple(lines): gpiod.LineSettings(edge_detection=Edge.BOTH)},
- ) as request:
- while True:
- for event in request.read_edge_events():
- print(event)
diff --git a/bindings/python/examples/gpionotify.py b/bindings/python/examples/gpionotify.py
deleted file mode 100755
index 4e50515..0000000
--- a/bindings/python/examples/gpionotify.py
+++ /dev/null
@@ -1,21 +0,0 @@
-#!/usr/bin/env python3
-# SPDX-License-Identifier: GPL-2.0-or-later
-# SPDX-FileCopyrightText: 2023 Bartosz Golaszewski <bartosz.golaszewski@xxxxxxxxxx>
-
-"""Simplified reimplementation of the gpionotify tool in Python."""
-
-import gpiod
-import sys
-
-if __name__ == "__main__":
- if len(sys.argv) < 3:
- raise TypeError("usage: gpionotify.py <gpiochip> <offset1> <offset2> ...")
-
- path = sys.argv[1]
-
- with gpiod.Chip(path) as chip:
- for line in sys.argv[2:]:
- chip.watch_line_info(line)
-
- while True:
- print(chip.read_info_event())
diff --git a/bindings/python/examples/gpioset.py b/bindings/python/examples/gpioset.py
deleted file mode 100755
index e6a516c..0000000
--- a/bindings/python/examples/gpioset.py
+++ /dev/null
@@ -1,36 +0,0 @@
-#!/usr/bin/env python3
-# SPDX-License-Identifier: GPL-2.0-or-later
-# SPDX-FileCopyrightText: 2022 Bartosz Golaszewski <brgl@xxxxxxxx>
-
-"""Simplified reimplementation of the gpioset tool in Python."""
-
-import gpiod
-import sys
-
-from gpiod.line import Direction, Value
-
-if __name__ == "__main__":
- if len(sys.argv) < 3:
- raise TypeError(
- "usage: gpioset.py <gpiochip> <offset1>=<value1> <offset2>=<value2> ..."
- )
-
- path = sys.argv[1]
-
- def parse_value(arg):
- x, y = arg.split("=")
- return (x, Value(int(y)))
-
- def make_settings(val):
- return gpiod.LineSettings(direction=Direction.OUTPUT, output_value=val)
-
- lvs = [parse_value(arg) for arg in sys.argv[2:]]
- config = dict((l, make_settings(v)) for (l, v) in lvs)
-
- request = gpiod.request_lines(
- path,
- consumer="gpioset.py",
- config=config,
- )
-
- input()
diff --git a/bindings/python/examples/helpers.py b/bindings/python/examples/helpers.py
deleted file mode 100644
index 8b91173..0000000
--- a/bindings/python/examples/helpers.py
+++ /dev/null
@@ -1,15 +0,0 @@
-# SPDX-License-Identifier: LGPL-2.1-or-later
-# SPDX-FileCopyrightText: 2022 Bartosz Golaszewski <brgl@xxxxxxxx>
-
-import gpiod
-import os
-
-
-def gpio_chips():
- for path in [
- entry.path
- for entry in os.scandir("/dev/")
- if gpiod.is_gpiochip_device(entry.path)
- ]:
- with gpiod.Chip(path) as chip:
- yield chip
diff --git a/bindings/python/examples/reconfigure_input_to_output.py b/bindings/python/examples/reconfigure_input_to_output.py
new file mode 100755
index 0000000..0f2e358
--- /dev/null
+++ b/bindings/python/examples/reconfigure_input_to_output.py
@@ -0,0 +1,39 @@
+#!/usr/bin/env python3
+# SPDX-License-Identifier: GPL-2.0-or-later
+# SPDX-FileCopyrightText: 2023 Kent Gibson <warthog618@xxxxxxxxx>
+
+"""Example of a bi-directional line requested as input and then switched to output."""
+
+import gpiod
+
+from gpiod.line import Direction, Value
+
+
+def reconfigure_input_to_output(chip_path, line_offset):
+ # request the line initially as an input
+ with gpiod.request_lines(
+ chip_path,
+ consumer="reconfigure-input-to-output",
+ config={line_offset: gpiod.LineSettings(direction=Direction.INPUT)},
+ ) as request:
+ # read the current line value
+ value = request.get_value(line_offset)
+ print("{}={} (input)".format(line_offset, value))
+ # switch the line to an output and drive it low
+ request.reconfigure_lines(
+ config={
+ line_offset: gpiod.LineSettings(
+ direction=Direction.OUTPUT, output_value=Value.INACTIVE
+ )
+ }
+ )
+ # report the current driven value
+ value = request.get_value(line_offset)
+ print("{}={} (output)".format(line_offset, value))
+
+
+if __name__ == "__main__":
+ try:
+ reconfigure_input_to_output("/dev/gpiochip0", 5)
+ except OSError as ex:
+ print(ex, "\nCustomise the example configuration to suit your situation")
diff --git a/bindings/python/examples/toggle_multiple_line_values.py b/bindings/python/examples/toggle_multiple_line_values.py
new file mode 100755
index 0000000..12b968d
--- /dev/null
+++ b/bindings/python/examples/toggle_multiple_line_values.py
@@ -0,0 +1,47 @@
+#!/usr/bin/env python3
+# SPDX-License-Identifier: GPL-2.0-or-later
+# SPDX-FileCopyrightText: 2023 Kent Gibson <warthog618@xxxxxxxxx>
+
+"""Minimal example of toggling multiple lines."""
+
+import gpiod
+import time
+
+from gpiod.line import Direction, Value
+
+
+def toggle_value(value):
+ if value == Value.INACTIVE:
+ return Value.ACTIVE
+ return Value.INACTIVE
+
+
+def toggle_multiple_line_values(chip_path, line_values):
+ value_str = {Value.ACTIVE: "Active", Value.INACTIVE: "Inactive"}
+
+ request = gpiod.request_lines(
+ chip_path,
+ consumer="toggle-multiple-line-values",
+ config={
+ tuple(line_values.keys()): gpiod.LineSettings(direction=Direction.OUTPUT)
+ },
+ output_values=line_values,
+ )
+
+ while True:
+ print(
+ " ".join("{}={}".format(l, value_str[v]) for (l, v) in line_values.items())
+ )
+ time.sleep(1)
+ for l, v in line_values.items():
+ line_values[l] = toggle_value(v)
+ request.set_values(line_values)
+
+
+if __name__ == "__main__":
+ try:
+ toggle_multiple_line_values(
+ "/dev/gpiochip0", {5: Value.ACTIVE, 3: Value.ACTIVE, 7: Value.INACTIVE}
+ )
+ except OSError as ex:
+ print(ex, "\nCustomise the example configuration to suit your situation")
diff --git a/bindings/python/examples/watch_line_info.py b/bindings/python/examples/watch_line_info.py
new file mode 100755
index 0000000..e49a669
--- /dev/null
+++ b/bindings/python/examples/watch_line_info.py
@@ -0,0 +1,23 @@
+#!/usr/bin/env python3
+# SPDX-License-Identifier: GPL-2.0-or-later
+# SPDX-FileCopyrightText: 2023 Kent Gibson <warthog618@xxxxxxxxx>
+
+"""Minimal example of watching for info changes on particular lines."""
+
+import gpiod
+
+
+def watch_line_info(chip_path, line_offsets):
+ with gpiod.Chip(chip_path) as chip:
+ for offset in line_offsets:
+ chip.watch_line_info(offset)
+
+ while True:
+ print(chip.read_info_event())
+
+
+if __name__ == "__main__":
+ try:
+ watch_line_info("/dev/gpiochip0", [5, 3, 7])
+ except OSError as ex:
+ print(ex, "\nCustomise the example configuration to suit your situation")
diff --git a/bindings/python/examples/watch_line_rising.py b/bindings/python/examples/watch_line_rising.py
new file mode 100755
index 0000000..2350d76
--- /dev/null
+++ b/bindings/python/examples/watch_line_rising.py
@@ -0,0 +1,31 @@
+#!/usr/bin/env python3
+# SPDX-License-Identifier: GPL-2.0-or-later
+# SPDX-FileCopyrightText: 2023 Kent Gibson <warthog618@xxxxxxxxx>
+
+"""Minimal example of watching for rising edges on a single line."""
+
+import gpiod
+
+from gpiod.line import Edge
+
+
+def watch_line_rising(chip_path, line_offset):
+ with gpiod.request_lines(
+ chip_path,
+ consumer="watch-line-rising",
+ config={line_offset: gpiod.LineSettings(edge_detection=Edge.RISING)},
+ ) as request:
+ while True:
+ # Blocks until at least one event is available
+ for event in request.read_edge_events():
+ print(
+ "line: %d type: Rising event #%d"
+ % (event.line_offset, event.line_seqno)
+ )
+
+
+if __name__ == "__main__":
+ try:
+ watch_line_rising("/dev/gpiochip0", 5)
+ except OSError as ex:
+ print(ex, "\nCustomise the example configuration to suit your situation")
diff --git a/bindings/python/examples/watch_multiple_line_values.py b/bindings/python/examples/watch_multiple_line_values.py
new file mode 100755
index 0000000..658ecee
--- /dev/null
+++ b/bindings/python/examples/watch_multiple_line_values.py
@@ -0,0 +1,42 @@
+#!/usr/bin/env python3
+# SPDX-License-Identifier: GPL-2.0-or-later
+# SPDX-FileCopyrightText: 2023 Kent Gibson <warthog618@xxxxxxxxx>
+
+"""Minimal example of watching for edges on multiple lines."""
+
+import gpiod
+
+from gpiod.line import Edge
+
+
+def edge_type(event):
+ if event.event_type is event.Type.RISING_EDGE:
+ return "Rising"
+ if event.event_type is event.Type.FALLING_EDGE:
+ return "Falling"
+ return "Unknown"
+
+
+def watch_multiple_line_values(chip_path, line_offsets):
+ with gpiod.request_lines(
+ chip_path,
+ consumer="watch-multiple-line-values",
+ config={tuple(line_offsets): gpiod.LineSettings(edge_detection=Edge.BOTH)},
+ ) as request:
+ while True:
+ for event in request.read_edge_events():
+ print(
+ "offset: {} type: {:<7} event #{} line event #{}".format(
+ event.line_offset,
+ edge_type(event),
+ event.global_seqno,
+ event.line_seqno,
+ )
+ )
+
+
+if __name__ == "__main__":
+ try:
+ watch_multiple_line_values("/dev/gpiochip0", [5, 3, 7])
+ except OSError as ex:
+ print(ex, "\nCustomise the example configuration to suit your situation")
--
2.41.0
[libgpiod][PATCH 1/4] bindings: python: examples: replace tools examples with use case examples
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- Subject: [libgpiod][PATCH 1/4] bindings: python: examples: replace tools examples with use case examples
- From: Kent Gibson <warthog618@xxxxxxxxx>
- Date: Sat, 24 Jun 2023 13:20:51 +0800
- In-reply-to: <20230624052054.13206-1-warthog618@gmail.com>
- References: <20230624052054.13206-1-warthog618@gmail.com>
- Follow-Ups:
- Re: [libgpiod][PATCH 1/4] bindings: python: examples: replace tools examples with use case examples
- From: Bartosz Golaszewski
- Re: [libgpiod][PATCH 1/4] bindings: python: examples: replace tools examples with use case examples
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- [libgpiod][PATCH 0/4] python examples and comment corrections
- From: Kent Gibson
- [libgpiod][PATCH 0/4] python examples and comment corrections
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