LineProcessor<Integer> conditional =
        new LineProcessor<Integer>() {
          int seen;

          @Override
          public boolean processLine(String line) {
            seen++;
            sb.append(line);
            return seen < 2;
          }

          @Override
          public Integer getResult() {
            return seen;
          }
        };

        try {
            final BufferedReader br = new BufferedReader(new InputStreamReader(in, Constants.UTF_8));
            String line;
            while ((line = br.readLine()) != null) {
                final String url = line.trim();
                if (StringUtil.isNotBlank(url) && (url.startsWith("http://") || url.startsWith("https://"))) {

To do that, create it right before the program itself, on the same line:

<div class="termy">

```console
// Create an env var MY_NAME in line for this program call
$ MY_NAME="Wade Wilson" python main.py

// Now it can read the environment variable

Hello Wade Wilson from Python

  }
}

/**
 * Reads lines from `IdnaMappingTable.txt`.
 *
 * Comment lines are either blank or start with a `#` character. Lines may also end with a comment.
 * All comments are ignored.
 *
 * Regular lines contain fields separated by semicolons.
 *
 * The first element on each line is a single hex code point (like 0041) or a hex code point range
 * (like 0030..0039).
 *

import java.util.List;
import java.util.Random;
import junit.framework.TestSuite;

/**
 * Unit test for {@link Files}.
 *
 * <p>Some methods are tested in separate files:
 *
 * <ul>
 *   <li>{@link Files#fileTraverser()} is tested in {@link FilesFileTraverserTest}.
 *   <li>{@link Files#createTempDir()} is tested in {@link FilesCreateTempDirTest}.
 * </ul>
 *
 * @author Chris Nokleberg
 */

        return systemProperties;
    }

    /**
     * Sets the system properties to use for interpolation and profile activation. The system properties are collected
     * from the runtime environment like {@link System#getProperties()} and environment variables.
     *
     * @param systemProperties The system properties, may be {@code null}.
     * @return This context, never {@code null}.
     */

     * environment like {@link System#getProperties()} and environment variables.
     *
     * @return The system properties, never {@code null}.
     */
    Properties getSystemProperties();

    /**
     * Sets the system properties to use for interpolation. The system properties are collected from the runtime
     * environment like {@link System#getProperties()} and environment variables.
     *

{* ../../docs_src/events/tutorial002.py hl[6] *}

Here, the `shutdown` event handler function will write a text line `"Application shutdown"` to a file `log.txt`.

/// info

In the `open()` function, the `mode="a"` means "append", so, the line will be added after whatever is on that file, without overwriting the previous contents.

///

/// tip

#          $$foreignAlias$$.VALID_BEGIN_DATE <= /*targetDate(Date)*/null
#      and $$foreignAlias$$.VALID_END_DATE >= /*targetDate(Date)*/null 
#         ; fixedSuffix = AsValid
#     }
# }
#
# *The line that starts with '#' means comment-out.
#
map:{
    #; FK_MEMBER_MEMBER_STATUS_CODE = map:{
    #    ; localTableName  = MEMBER             ; foreignTableName  = MEMBER_STATUS

        final String[] values = input.split("\n");
        final List<String> list = new ArrayList<>(values.length);
        int lineNum = 0;
        for (final String line : values) {
            final Matcher matcher = pattern.matcher(line);
            if (matcher.matches()) {
                if (lineNum == 0) {
                    lineNum = Integer.parseInt(matcher.group(1));
                    list.clear();