SageMath version and banner info¶
Print the Sage banner.
INPUT:
- full – boolean (optional, default = None)
OUTPUT:
None
If option full is False, a simplified plain ASCII banner is displayed; if True the full banner with box art is displayed. By default this is determined from the SAGE_BANNER environment variable– if its value is “bare” this implies full=False. Otherwise full=True by default.
EXAMPLES:
sage: banner(full=True) ┌────────────────────────────────────────────────────────────────────┐ │ SageMath version ..., Release Date: ... │ Type "notebook()" for the browser-based notebook interface. │ │ Type "help()" for help. │ ...
Text for the Sage banner.
INPUT:
- full – boolean (optional, default = None)
OUTPUT:
A string containing the banner message.
If option full is False, a simplified plain ASCII banner is displayed; if True the full banner with box art is displayed. By default this is determined from the SAGE_BANNER environment variable– if its value is “bare” this implies full=False. Otherwise full=True by default.
EXAMPLES:
sage: print(sage.misc.banner.banner_text(full=True)) ┌────────────────────────────────────────────────────────────────────┐ │ SageMath version ... sage: print(sage.misc.banner.banner_text(full=False)) SageMath version ..., Release Date: ...
True if Sage version is at least major.minor.tiny.
INPUT:
- major – integer
- minor – integer (optional, default = 0)
- tiny – float (optional, default = 0)
- prerelease – boolean (optional, default = False)
- print_message – boolean (optional, default = False)
OUTPUT:
True if major.minor.tiny is <= version of Sage, False otherwise
For example, if the Sage version number is 3.1.2, then require_version(3, 1, 3) will return False, while require_version(3, 1, 2) will return True. If the Sage version is 3.1.2.alpha0, then require_version(3, 1, 1) will return True, while, by default, require_version(3, 1, 2) will return False. Note, though, that require_version(3, 1, 2, prerelease=True) will return True: if the optional argument prerelease is True, then a prerelease version of Sage counts as if it were the released version.
If optional argument print_message is True and this function is returning False, print a warning message.
EXAMPLES:
sage: from sage.misc.banner import require_version sage: require_version(2, 1, 3) True sage: require_version(821, 4) False sage: require_version(821, 4, print_message=True) This code requires at least version 821.4 of SageMath to run correctly. You are running version ... False
Return the version of Sage.
OUTPUT:
str
EXAMPLES:
sage: version() 'SageMath version ..., Release Date: ...'
A dictionary describing the version of Sage.
INPUT:
nothing
OUTPUT:
dictionary with keys ‘major’, ‘minor’, ‘tiny’, ‘prerelease’
This process the Sage version string and produces a dictionary. It expects the Sage version to be in one of these forms:
N.N N.N.N N.N.N.N N.N.str N.N.N.str N.N.N.N.str
where ‘N’ stands for an integer and ‘str’ stands for a string. The first integer is stored under the ‘major’ key and the second integer under ‘minor’. If there is one more integer, it is stored under ‘tiny’; if there are two more integers, then they are stored together as a float N.N under ‘tiny’. If there is a string, then the key ‘prerelease’ returns True.
For example, if the Sage version is ‘3.2.1’, then the dictionary is {‘major’: 3, ‘minor’: 2, ‘tiny’: 1, ‘prerelease’: False}. If the Sage version is ‘3.2.1.2’, then the dictionary is {‘major’: 3, ‘minor’: 2, ‘tiny’: 1.200..., ‘prerelease’: False}. If the Sage version is ‘3.2.alpha0’, then the dictionary is {‘major’: 3, ‘minor’: 2, ‘tiny’: 0, ‘prerelease’: True}.
EXAMPLES:
sage: from sage.misc.banner import version_dict sage: print("SageMath major version is %s" % version_dict()['major']) SageMath major version is ... sage: version_dict()['major'] == int(sage.version.version.split('.')[0]) True