I'm trying to figure out how Xcode formats floats in its XIB/Storyboard XML. So far, I'm stumped.

test.py

import re


# I'm trying to figure out how Xcode formats floats in its XIB/Storyboard XML. So far, I'm stumped.

# Data from Xcode
data = values = ["0.0", "0.0039215686274509803", "0.0078431372549019607", "0.011764705882352941", "0.0039215686274509803", "0.019607843137254902", "0.023529411764705882", "0.027450980392156862", "0.031372549019607843", "0.035294117647058823", "0.039215686274509803", "0.043137254901960784", "0.047058823529411764", "0.050980392156862744", "0.054901960784313725", "0.058823529411764705", "0.062745098039215685", "0.066666666666666666", "0.070588235294117646", "0.074509803921568626", "0.078431372549019607", "0.082352941176470587", "0.086274509803921567", "0.090196078431372548", "0.094117647058823528", "0.098039215686274508", "0.10196078431372549", "0.10588235294117647", "0.10980392156862745", "0.11372549019607843", "0.11764705882352941", "0.12156862745098039", "0.12549019607843137", "0.12941176470588234", "0.13333333333333333", "0.13725490196078433", "0.14117647058823529", "0.14509803921568626", "0.14901960784313725", "0.15294117647058825", "0.15686274509803921", "0.16078431372549018", "0.16470588235294117", "0.16862745098039217", "0.17254901960784313", "0.1764705882352941", "0.1803921568627451", "0.18431372549019609", "0.18823529411764706", "0.19215686274509802", "0.19607843137254902", "0.20000000000000001", "0.20392156862745098", "0.20784313725490194", "0.21176470588235294", "0.21568627450980393", "0.2196078431372549", "0.22352941176470587", "0.22745098039215686", "0.23137254901960785", "0.23529411764705882", "0.23921568627450979", "0.24313725490196078", "0.24705882352941178", "0.25098039215686274", "0.25490196078431371", "0.25882352941176467", "0.2627450980392157", "0.26666666666666666", "0.27058823529411763", "0.27450980392156865", "0.27843137254901962", "0.28235294117647058", "0.28627450980392155", "0.29019607843137252", "0.29411764705882354", "0.29803921568627451", "0.30196078431372547", "0.30588235294117649", "0.30980392156862746", "0.31372549019607843", "0.31764705882352939", "0.32156862745098036", "0.32549019607843138", "0.32941176470588235", "0.33333333333333331", "0.33725490196078434", "0.3411764705882353", "0.34509803921568627", "0.34901960784313724", "0.3529411764705882", "0.35686274509803922", "0.36078431372549019", "0.36470588235294116", "0.36862745098039218", "0.37254901960784315", "0.37647058823529411", "0.38039215686274508", "0.38431372549019605", "0.38823529411764707", "0.39215686274509803", "0.396078431372549", "0.40000000000000002", "0.40392156862745099", "0.40784313725490196", "0.41176470588235292", "0.41568627450980389", "0.41960784313725491", "0.42352941176470588", "0.42745098039215684", "0.43137254901960786", "0.43529411764705883", "0.4392156862745098", "0.44313725490196076", "0.44705882352941173", "0.45098039215686275", "0.45490196078431372", "0.45882352941176469", "0.46274509803921571", "0.46666666666666667", "0.47058823529411764", "0.47450980392156861", "0.47843137254901957", "0.4823529411764706", "0.48627450980392156", "0.49019607843137253", "0.49411764705882355", "0.49803921568627452", "0.50196078431372548", "0.50588235294117645", "0.50980392156862742", "0.51372549019607838", "0.51764705882352935", "0.52156862745098043", "0.52549019607843139", "0.52941176470588236", "0.53333333333333333", "0.53725490196078429", "0.54117647058823526", "0.54509803921568623", "0.5490196078431373", "0.55294117647058827", "0.55686274509803924", "0.5607843137254902", "0.56470588235294117", "0.56862745098039214", "0.5725490196078431", "0.57647058823529407", "0.58039215686274503", "0.58431372549019611", "0.58823529411764708", "0.59215686274509804", "0.59607843137254901", "0.59999999999999998", "0.60392156862745094", "0.60784313725490191", "0.61176470588235299", "0.61568627450980395", "0.61960784313725492", "0.62352941176470589", "0.62745098039215685", "0.63137254901960782", "0.63529411764705879", "0.63921568627450975", "0.64313725490196072", "0.6470588235294118", "0.65098039215686276", "0.65490196078431373", "0.6588235294117647", "0.66274509803921566", "0.66666666666666663", "0.6705882352941176", "0.67450980392156867", "0.67843137254901964", "0.68235294117647061", "0.68627450980392157", "0.69019607843137254", "0.69411764705882351", "0.69803921568627447", "0.70196078431372544", "0.70588235294117641", "0.70980392156862748", "0.71372549019607845", "0.71764705882352942", "0.72156862745098038", "0.72549019607843135", "0.72941176470588232", "0.73333333333333328", "0.73725490196078436", "0.74117647058823533", "0.74509803921568629", "0.74901960784313726", "0.75294117647058822", "0.75686274509803919", "0.76078431372549016", "0.76470588235294112", "0.7686274509803922", "0.77254901960784317", "0.77647058823529413", "0.7803921568627451", "0.78431372549019607", "0.78823529411764703", "0.7803921568627451", "0.78431372549019607", "0.78823529411764703", "0.80392156862745101", "0.80784313725490198", "0.81176470588235294", "0.81568627450980391", "0.81960784313725488", "0.82352941176470584", "0.82745098039215681", "0.83137254901960778", "0.83529411764705885", "0.83921568627450982", "0.84313725490196079", "0.84705882352941175", "0.85098039215686272", "0.85490196078431369", "0.85882352941176465", "0.86274509803921573", "0.8666666666666667", "0.87058823529411766", "0.87450980392156863", "0.8784313725490196", "0.88235294117647056", "0.88627450980392153", "0.8901960784313725", "0.89411764705882346", "0.89803921568627454", "0.90196078431372551", "0.90588235294117636", "0.90980392156862744", "0.9137254901960784", "0.91764705882352937", "0.92156862745098034", "0.92549019607843142", "0.92941176470588227", "0.93333333333333335", "0.93725490196078431", "0.94117647058823517", "0.94509803921568625", "0.94901960784313721", "0.95294117647058807", "0.95686274509803915", "0.96078431372549022", "0.96470588235294097", "0.96862745098039216", "0.97254901960784312", "0.97647058823529387", "0.98039215686274506", "0.98431372549019602", "0.98823529411764677", "0.99215686274509807", "0.99607843137254903", "1"]

def format_value(value):
  # type: (int) -> str

  # Convert from an int from 0-255 to a float from 0-1
  value = float(i) / 255.0

  # TODO: Figure out how format this correctly
  string = ("%0.18f" % value).rstrip("0")
  string = re.sub(r'([0-9.]+)0$', '\\1', string)
  return re.sub(r'([0-9]+)\.$', '\\1.0', string)

# Test each value from 0-255
for i in range(len(data)):
  string = format_value(i)
  expected = data[i]

  # Print ones that are incorrect
  if string != expected:
    print("{}\t\t{}\t{}".format(i, string, expected))