Since Python 3.7 you can change the encoding of standard streams with reconfigure(): sys.stdout.reconfigure(encoding=’utf-8′) You can also modify how encoding errors are handled by adding an errors parameter.
If the function is printing to System.out, you can capture that output by using the System.setOut method to change System.out to go to a PrintStream provided by you. If you create a PrintStream connected to a ByteArrayOutputStream, then you can capture the output as a String. Example: // Create a stream to hold the output … Read more
sys.stdout is a file object corresponding to the program’s standard output. You can use its write() method. Note that it’s probably not necessary to use the with statement, because stdout does not have to be opened or closed. So, if you need to create a csv.writer object, you can just say: import sys spamwriter = … Read more
Not enough rep to comment, but I wanted to add the version of this that worked for me in case others are in a similar situation. class LoggerWriter: def __init__(self, level): # self.level is really like using log.debug(message) # at least in my case self.level = level def write(self, message): # if statement reduces the … Read more
I see that this is a rather old post but just in case someone is still searching for a way to do this: proc = subprocess.Popen([“ping”, “localhost”], stdout=subprocess.PIPE, stderr=subprocess.PIPE) with open(“logfile.txt”, “w”) as log_file: while proc.poll() is None: line = proc.stderr.readline() if line: print “err: ” + line.strip() log_file.write(line) line = proc.stdout.readline() if line: print … Read more
On Unix systems you can do the following: import sys import select if select.select([sys.stdin, ], [], [], 0.0)[0]: print(“Have data!”) else: print(“No data”) On Windows the select module may only be used with sockets though so you’d need to use an alternative mechanism.
I’ve had some success in solving this problem of mine. Here are the details, with some explanations, in case anyone having a similar problem finds this page. But if you don’t care for details, here’s the short answer: Use PTY.spawn in the following manner (with your own command of course): require ‘pty’ cmd = “blender … Read more
Try stdbuf, included in GNU coreutils and thus virtually any Linux distro. This sets the buffer length for input, output and error to zero: stdbuf -i0 -o0 -e0 command
For Rails 4.x the log level is configured a bit different than in Rails 3.x Add this to config/environment/test.rb # Enable stdout logger config.logger = Logger.new(STDOUT) # Set log level config.log_level = :ERROR The logger level is set on the logger instance from config.log_level at: https://github.com/rails/rails/blob/v4.2.4/railties/lib/rails/application/bootstrap.rb#L70 Environment variable As a bonus, you can allow overwriting … Read more
$stdout is a global variable that represents the current standard output. STDOUT is a constant representing standard output and is typically the default value of $stdout. With STDOUT being a constant, you shouldn’t re-define it, however, you can re-define $stdout without errors/warnings (re-defining STDOUT will raise a warning). for example, you can do: $stdout = … Read more