# source: Gribouillis at www.daniweb.com - 2008
def mendeleiev_table ():
"""Returns the mendeleiev table as a python list of lists.
Each cell contains either None or a pair (symbol, number),
or a list of pairs for the cells * and **.
"""
data ="""
2008 transposed mendeleiev table with atomic numbers
BEGIN
H 1 | Li 3 | Na 11 | K 19 | Rb 37 | Cs 55 | Fr 87
| Be 4 | Mg 12 | Ca 20 | Sr 38 | Ba 56 | Ra 88
| | | Sc 21 | Y 39 | * | **
| | | Ti 22 | Zr 40 | Hf 72 | Rf 104
| | | V 23 | Nb 41 | Ta 73 | Db 105
| | | Cr 24 | Mo 42 | W 74 | Sg 106
| | | Mn 25 | Tc 43 | Re 75 | Bh 107
| | | Fe 26 | Ru 44 | Os 76 | Hs 108
| | | Co 27 | Rh 45 | Ir 77 | Mt 109
| | | Ni 28 | Pd 46 | Pt 78 | Ds 110
| | | Cu 29 | Ag 47 | Au 79 | Rg 111
| | | Zn 30 | Cd 48 | Hg 80 | Uub 112
| B 5 | Al 13 | Ga 31 | In 49 | Tl 81 | Uut 113
| C 6 | Si 14 | Ge 32 | Sn 50 | Pb 82 | Uuq 114
| N 7 | P 15 | As 33 | Sb 51 | Bi 83 | Uup 115
| O 8 | S 16 | Se 34 | Te 52 | Po 84 | Uuh 116
| F 9 | Cl 17 | Br 35 | I 53 | At 85 | Uus 117
He 2 | Ne 10 | Ar 18 | Kr 36 | Xe 54 | Rn 86 | Uuo 118
END
* **
La 57 | Ac 89
Ce 58 | Th 90
Pr 59 | Pa 91
Nd 60 | U 92
Pm 61 | Np 93
Sm 62 | Pu 94
Eu 63 | Am 95
Gd 64 | Cm 96
Tb 65 | Bk 97
Dy 66 | Cf 98
Ho 67 | Es 99
Er 68 | Fm 100
Tm 69 | Md 101
Yb 70 | No 102
Lu 71 | Lr 103
"""
lines =[line .strip ()for line in data .split ("\n")]
begin =lines .index ("BEGIN")
end =lines .index ("END")
nrows =len (lines [begin +1 ].split ("|"))
ncols =end -begin -1
# create initial table with empty cells
table =[[None ]*ncols for i in range (nrows )]
# read lanthanids and actinids
dic ={"*":[],"**":[]}
for x ,y in [line .split ("|")for line in lines [end +2 :-1 ]]:
e ,n =x .strip ().split ()
dic ["*"].append ((e ,int (n )))
e ,n =y .strip ().split ()
dic ["**"].append ((e ,int (n )))
for col ,line in enumerate (lines [begin +1 :end ]):
for row ,content in enumerate (line .split ("|")):
content =content .strip ()
if content in dic :
table [row ][col ]=dic [content ]
elif content :
e ,n =content .split ()
table [row ][col ]=(e ,int (n ))
return table
