Logging Utilities¶

Banners¶

The utils.banner api formats a string into a banner message, which can be then passed to logger APIs. It itself does not perform logging, and instead only performs style formatting of its input messages.

Banner API behaviors:

It accepts the following arguments

The width of the banner can be altered with width = W. W must be an int. The default value is 80.
The minimum ammount of white space to center the text can be altered with padding = Y. Y must be an int. The default value is 8.
The character that represents the top and bottom border of the box can be modified with h_margin = Z. Z must be a string and its size must be of 1. The default value is -.
The character that represents the right and left side border of the box can be modified with v_margin = X. X must be a string and its size must be of 1. The default value is |

Note

The width of the banner must always be greater than the padding + 2 (for each side)

Note

Newline characters in the message are respected

Note

Single words (non-space separated) longer than the max width are chopped into max-width automatically.

# Example
# -------
#
#   print a banner message

from pyats.log.utils import banner

# printing directly
msg = banner('a banner message')
print(msg)
print(banner('aReallyLongMessageThatIsLongerThanMaxWidthIsChoppedUp',
             width = 40))

# Output
# ------
#
# +------------------------------------------------------------------------------+
# |                               a banner message                               |
# +------------------------------------------------------------------------------+
# +--------------------------------------+
# |    aReallyLongMessageThatIsLonger    |
# |       ThanMaxWidthIsChoppedUp        |
# +--------------------------------------+


# printing to log
import logging
logger = logging.getLogger(__name__)

logger.info(banner('an informational message banner'))
logger.error(banner('an error message\nwith newline'))

# Output
# ------
#
# +------------------------------------------------------------------------------+
# |                       an informational message banner                        |
# +------------------------------------------------------------------------------+
# +------------------------------------------------------------------------------+
# |                               an error message                               |
# |                                 with newline                                 |
# +------------------------------------------------------------------------------+

# Changing margin
msg = banner('a message', v_margin='!', h_margin='&')
print(msg)

# Output
# ------
#
# +&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&+
# !                                  a message                                   !
# +&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&+

Titles¶

The utils.title api formats a string into a title message, which can be then passed to logger APIs. It itself does not perform logging, and instead only performs style formatting of its input messages.

Title API behaviors:

It accepts the following arguments

The width of the title can be altered with width = W. W must be an int. The default value is 80.
The minimum ammount of space that is filled with margin to center the text can be altered with padding = Y. Y must be an int. The default value is 10.
The character that fills the empty space within the given width can be modified with margin = Z. Z must be a string and its size must be of 1. The default value is =.

Note

The width of the title must always be greater than the padding

Note

Newline characters in the message are respected

Note

Single words (non-space separated) longer than the max width are chopped into max-width automatically.

# Example
# -------
#
#   print a title message

from pyats.log.utils import title

# printing directly
msg = title('a title message')
print(msg)
print(title('aReallyLongMessageThatIsLongerThanMaxWidthIsChoppedUp',
             width = 38))

# Output
# ------
#
# ================================a title message=================================
# ====aReallyLongMessageThatIsLonger====
# =======ThanMaxWidthIsChoppedUp========

# printing to log
import logging
logger = logging.getLogger(__name__)

logger.info(title('an informational message title'))
logger.error(title('an error message\nwith newline'))

# Output
# ------
#
# =========================an informational message title=========================
# ================================an error message================================
# ==================================with newline==================================

# Changing margin
msg = title('a message', margin='!')
print(msg)

# Output
# ------
#
# !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!a message!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!