import re import pandas as pd import numpy as np class Table(): """Store spreadsheet-like data.""" def __init__(self,data,shapes,comments=None): """ New spreadsheet. Parameters ---------- data : numpy.ndarray Data. shapes : dict with str:tuple pairs Shapes of the columns. Example 'F':(3,3) for a deformation gradient. comments : iterable of str, optional Additional, human-readable information. """ self.comments = [] if comments is None else [c for c in comments] self.data = pd.DataFrame(data=data) self.shapes = shapes self.__label_condensed() def __label_flat(self): """Label data individually, e.g. v v v ==> 1_v 2_v 3_v.""" labels = [] for label,shape in self.shapes.items(): size = np.prod(shape) labels += ['{}{}'.format('' if size == 1 else '{}_'.format(i+1),label) for i in range(size)] self.data.columns = labels def __label_condensed(self): """Label data condensed, e.g. 1_v 2_v 3_v ==> v v v.""" labels = [] for label,shape in self.shapes.items(): labels += [label] * np.prod(shape) self.data.columns = labels def __add_comment(self,label,shape,info): if info is not None: self.comments.append('{}{}: {}'.format(label, ' '+str(shape) if np.prod(shape,dtype=int) > 1 else '', info)) @staticmethod def from_ASCII(fname): """ Create table from ASCII file. The first line needs to indicate the number of subsequent header lines as 'n header'. Vector data column labels are indicated by '1_v, 2_v, ..., n_v'. Tensor data column labels are indicated by '3x3:1_T, 3x3:2_T, ..., 3x3:9_T'. Parameters ---------- fname : file, str, or pathlib.Path Filename or file for reading. """ try: f = open(fname) except TypeError: f = fname header,keyword = f.readline().split() if keyword == 'header': header = int(header) else: raise Exception comments = [f.readline()[:-1] for i in range(1,header)] labels = f.readline().split() shapes = {} for label in labels: tensor_column = re.search(r'[0-9,x]*?:[0-9]*?_',label) if tensor_column: my_shape = tensor_column.group().split(':',1)[0].split('x') shapes[label.split('_',1)[1]] = tuple([int(d) for d in my_shape]) else: vector_column = re.match(r'[0-9]*?_',label) if vector_column: shapes[label.split('_',1)[1]] = (int(label.split('_',1)[0]),) else: shapes[label] = (1,) data = pd.read_csv(f,names=list(range(len(labels))),sep=r'\s+').to_numpy() return Table(data,shapes,comments) @property def labels(self): """Return the labels of all columns.""" return list(self.shapes.keys()) def get(self,label): """ Get column data. Parameters ---------- label : str Column label. """ if re.match(r'[0-9]*?_',label): idx,key = label.split('_',1) data = self.data[key].to_numpy()[:,int(idx)-1].reshape((-1,1)) else: data = self.data[label].to_numpy().reshape((-1,)+self.shapes[label]) return data.astype(type(data.flatten()[0])) def set(self,label,data,info=None): """ Set column data. Parameters ---------- label : str Column label. data : np.ndarray New data. info : str, optional Human-readable information about the new data. """ self.__add_comment(label,data.shape[1:],info) if re.match(r'[0-9]*?_',label): idx,key = label.split('_',1) iloc = self.data.columns.get_loc(key).tolist().index(True) + int(idx) -1 self.data.iloc[:,iloc] = data else: self.data[label] = data.reshape(self.data[label].shape) def add(self,label,data,info=None): """ Add column data. Parameters ---------- label : str Column label. data : np.ndarray Modified data. info : str, optional Human-readable information about the modified data. """ self.__add_comment(label,data.shape[1:],info) self.shapes[label] = data.shape[1:] if len(data.shape) > 1 else (1,) size = np.prod(data.shape[1:],dtype=int) new = pd.DataFrame(data=data.reshape(-1,size), columns=[label]*size, ) new.index = self.data.index self.data = pd.concat([self.data,new],axis=1) def delete(self,label): """ Delete column data. Parameters ---------- label : str Column label. """ self.data.drop(columns=label,inplace=True) del self.shapes[label] def rename(self,label_old,label_new,info=None): """ Rename column data. Parameters ---------- label_old : str Old column label. label_new : str New column label. """ self.data.rename(columns={label_old:label_new},inplace=True) self.comments.append('{} => {}{}'.format(label_old, label_new, '' if info is None else ': {}'.format(info), )) self.shapes[label_new] = self.shapes.pop(label_old) def sort_by(self,labels,ascending=True): """ Get column data. Parameters ---------- label : str or list Column labels. ascending : bool or list, optional Set sort order. """ self.__label_flat() self.data.sort_values(labels,axis=0,inplace=True,ascending=ascending) self.__label_condensed() self.comments.append('sorted by [{}]'.format(', '.join(labels))) def to_ASCII(self,fname): """ Store as plain text file. Parameters ---------- fname : file, str, or pathlib.Path Filename or file for reading. """ labels = [] for l in self.shapes: if(self.shapes[l] == (1,)): labels.append('{}'.format(l)) elif(len(self.shapes[l]) == 1): labels += ['{}_{}'.format(i+1,l) \ for i in range(self.shapes[l][0])] else: labels += ['{}:{}_{}'.format('x'.join([str(d) for d in self.shapes[l]]),i+1,l) \ for i in range(np.prod(self.shapes[l],dtype=int))] header = ['{} header'.format(len(self.comments)+1)] \ + self.comments \ + [' '.join(labels)] try: f = open(fname,'w') except TypeError: f = fname for line in header: f.write(line+'\n') self.data.to_csv(f,sep=' ',index=False,header=False)