cmind.utils.utils

Miscellaneous Utilities A group of small functions commonly used within the CMIND pipelines

str2list dprint input2bool sphere str2none is_string_like parser_to_bash fsl_highpass_temporal_filter1D calc_tSNR_regress

Functions

calc_tSNR_regress(image[, DesMat, mask, ...])	regresses out Design Matrix components before calculating the standard deviation so that task related signal changes don’t penalize the tSNR value
confirm([prompt, resp])	prompts for yes or no response from the user. Returns True for yes and
dprint(input_dict[, HTML_markup, silent])	print dictionary key,value pairs
fsl_highpass_temporal_filter1D(volume1D, sigma)	perform highpass temporal filtering the way it is done in FSL
get_unicode_type()	determine if the Python installation was compiled with –enable-unicode=ucs4 or ucs2
input2bool(input_val)	convert various input types to boolean
input2list(input_val[, seperator, convert_to])	convert various input types to lists
is_string_like(obj)	Check whether obj behaves like a string.
lprint(input_list[, HTML_markup, silent])	print list items, one per line
parser_to_bash(parser, script_name[, ...])
reindent(s[, numSpaces])	add indentation to a multiline string
sphere([r, N])	create an ndarray (x,y,z) coordinates over a sphere of radius r
str2list(csvstring[, str_strip, str_split])	separates a comma seperated string such as “a, b, c, d”
str2none(s[, none_strings])	convert strings such as “none” to the Python None object, otherwise

cmind.utils.utils.calc_tSNR_regress(image, DesMat=None, mask=None, doResidual=False)

regresses out Design Matrix components before calculating the standard deviation so that task related signal changes don’t penalize the tSNR value

Parameters:

image : ndarray

input image to calculate tSNR on

DesMat : ndarray

design matrix [Time x Regressors]

mask : ndarray

boolean image of pixel locations over which to calculate tSNR

doResidual : bool

compute residuals?

Returns:

tSNR : ndarray

map of the computed tSNR values

mask : ndarray

the mask that was used in computing tSNR

mean_tSNR : float

mean values of tSNR over the mask

res : ndarray

residuals

cmind.utils.utils.confirm(prompt=None, resp=False)

prompts for yes or no response from the user. Returns True for yes and False for no.

‘resp’ should be set to the default value assumed by the caller when user simply types ENTER.

>>> confirm(prompt='Create Directory?', resp=True)
Create Directory? [y]|n: 
True
>>> confirm(prompt='Create Directory?', resp=False)
Create Directory? [n]|y: 
False
>>> confirm(prompt='Create Directory?', resp=False)
Create Directory? [n]|y: y
True

modified from:

http://code.activestate.com/recipes/541096-prompt-the-user-for-confirmation/

cmind.utils.utils.dprint(input_dict, HTML_markup=False, silent=False)

print dictionary key,value pairs

Parameters:

input_dict : dict

dictionary to print

cmind.utils.utils.fsl_highpass_temporal_filter1D(volume1D, sigma, demean_result=True)

perform highpass temporal filtering the way it is done in FSL (based on the FSL C function: bandpass_temporal_filter)

Parameters:

volume1D : array or list

1D timeseries to filter

sigma : float

sigma is in timepoints

Returns:

volume1D_filt : array

filtered timeseries

cmind.utils.utils.get_unicode_type()

determine if the Python installation was compiled with –enable-unicode=ucs4 or ucs2

cmind.utils.utils.input2bool(input_val)

convert various input types to boolean

Parameters:

input_val : str or bool or int or float

input to convert

Returns:

boolval : bool

boolean output

Notes

If input_val is a bool, boolval = input_val.

If input_val is a str, the following case-insensitive conversions are made:

• [true, t, 1] evaluate to True (case insensitive)
• [false, f, 0, none] evaluate to False (case insensitive)
• any other string raises an error

If input_val is numeric and equals 0, boolval is False.

cmind.utils.utils.input2list(input_val, seperator=', ', convert_to=None)

convert various input types to lists

Parameters:

input_val : str or bool or int or float or numpy.ndarray or list or tuple

input to convert to list

Returns:

output_list : list

Notes

If input_val is a string, any brackets will be stripped and then the string will be split via the seperator argument. e.g. ‘x,y,z’ would become the list: [‘x’, ‘y’, ‘z’]

cmind.utils.utils.is_string_like(obj)

Check whether obj behaves like a string.

cmind.utils.utils.lprint(input_list, HTML_markup=False, silent=False)

print list items, one per line

Parameters:

input_list : dict

list to print

cmind.utils.utils.parser_to_bash(parser, script_name, npdocstr=None, out_file=None)

cmind.utils.utils.reindent(s, numSpaces=4)

add indentation to a multiline string

cmind.utils.utils.sphere(r=1, N=100)

create an ndarray (x,y,z) coordinates over a sphere of radius r

Parameters:

r : float, optional

radius of sphere

N : int, optional

number of equal angular divisions to use along theta and phi

Returns:

x : ndarray

x coordinates

y : ndarray

y coordinates

z : ndarray

z coordinates

cmind.utils.utils.str2list(csvstring, str_strip='"', str_split=', ')

separates a comma seperated string such as “a, b, c, d”

into a list [‘a’,’b’,’c’,’d’]

Parameters:

csvstring : str

string to be split into a list

str_strip : str, optional

strip instances of str_strip from csvstring before splitting. default = ‘”’

str_split : str, optional

string argument to be used by split() when processing csvstring default = ‘,’

Returns:

str_list : list

list of strings

cmind.utils.utils.str2none(s, none_strings=['none'])

convert strings such as “none” to the Python None object, otherwise return the orginal string.

Parameters:

s : str

input string to potentially convert

none_matches : list, optional

lowercase list of input strings to convert to None