OR updates

Author: iansedano

subprocess/choice_react_popen_read_write.py

@@ -0,0 +1,43 @@
+import subprocess
+
+
+def get_char(process):
+    character = process.stdout.read(1)
+    print(
+        character,
+        end="",
+        flush=True,  # So display is the same as running it directly
+    )
+    return character
+
+
+def search_for_output(string, process):
+    buffer = ""
+    while True:
+        buffer = buffer + get_char(process)
+        if string in buffer:
+            return
+
+
+with subprocess.Popen(
+    [
+        "python",
+        "-u",  # So display is the same as running it directly
+        "choice_react.py",
+    ],
+    stdin=subprocess.PIPE,
+    stdout=subprocess.PIPE,
+    text=True,
+) as process:
+
+    buffer = ""
+
+    search_for_output("when you are ready\n", process)
+    process.stdin.write("\n")
+    process.stdin.flush()
+    search_for_output("==\n= ", process)
+    stdout, stderr = process.communicate(f"{get_char(process)}\n", timeout=10)
+    print(stdout)
+
+
+print(process)

subprocess/exiter_run.py

@@ -0,0 +1,8 @@
+import subprocess
+
+subprocess.run(["python", "exiter.py"], check=False)
+
+try:
+    subprocess.run(["python", "exiter.py"], check=True)
+except subprocess.CalledProcessError as exc:
+    print(exc)

subprocess/random_num_gen_check_output.py

@@ -1,3 +1,7 @@
 import subprocess
 
-print(subprocess.check_output(["python", "random_num_gen.py"]).strip())
+process = subprocess.run(
+    ["python", "random_num_gen.py"], capture_output=True, text=True
+)
+
+print(int(process.stdout))

subprocess/simple_react_popen_read_write.py

@@ -1,37 +1,37 @@
 import subprocess
 from time import sleep
 
-process = subprocess.Popen("python timer.py 5")
-
-print(process.poll())  # returns None because process not yet finished
-sleep(3)
-print(process.poll())  # None
-sleep(3)
-print(process.poll())  # 0
-
-process = subprocess.Popen("python timer.py 5", stdout=subprocess.PIPE)
-
-print(process.poll())
-print(process.stdout.read())  # reads everything and blocks until EOF
-sleep(3)
-print(process.poll())  # returns 0 because that is exit code
-print(process.stdout.read())  # b''
-sleep(3)
-print(process.poll())  # 0
-print(process.stdout.read())  # b''
-
-
-process = subprocess.Popen("python timer.py 5", stdout=subprocess.PIPE)
-
-# https://stackoverflow.com/questions/57726771/what-the-difference-between-read-and-read1-in-python
-# https://docs.python.org/3/library/io.html?highlight=read1#io.BufferedIOBase.read1
-# https://docs.python.org/3/library/io.html?highlight=read1#io.BufferedIOBase.read
-
-print(process.poll())
-print(process.stdout.read1())
-sleep(3)
-print(process.poll())
-print(process.stdout.read1())
-sleep(3)
-print(process.poll())
-print(process.stdout.read1())
+with subprocess.Popen("python timer.py 5") as process:
+
+    print(process.poll())  # returns None because process not yet finished
+    sleep(3)
+    print(process.poll())  # None
+    sleep(3)
+    print(process.poll())  # 0
+
+with subprocess.Popen("python timer.py 5", stdout=subprocess.PIPE) as process:
+
+    print(process.poll())
+    print(process.stdout.read())  # reads everything and blocks until EOF
+    sleep(3)
+    print(process.poll())  # returns 0 because that is exit code
+    print(process.stdout.read())  # b''
+    sleep(3)
+    print(process.poll())  # 0
+    print(process.stdout.read())  # b''
+
+
+with subprocess.Popen("python timer.py 5", stdout=subprocess.PIPE) as process:
+
+    # https://stackoverflow.com/questions/57726771/what-the-difference-between-read-and-read1-in-python
+    # https://docs.python.org/3/library/io.html?highlight=read1#io.BufferedIOBase.read1
+    # https://docs.python.org/3/library/io.html?highlight=read1#io.BufferedIOBase.read
+
+    print(process.poll())
+    print(process.stdout.read1())
+    sleep(3)
+    print(process.poll())
+    print(process.stdout.read1())
+    sleep(3)
+    print(process.poll())
+    print(process.stdout.read1())